2012年2月8日星期三

The rewards of trying again

Reinvention isn't in that league. The tip-off is the "re," meaning it's been done before. If invention is the dazzling hit, reinvention usually begins as a miss. But a miss that is taken back into the workshop, rethought, reworked, and brought out for a second, third, or fourth try can change the world. The light bulb,The LED bike headlight LED rear flash light lamp bicycle torch suitable for students, baby stroller,bestledstriplight for instance, only stayed lit after it hadn't at least 6,000 times. Each time,,bestbikelight are inexpensive and easy to install, and they're a must-have for night cyclists. Edison and his co-workers took stock of what went wrong, made improvements, and tried again. His invention was a serial reinvention.

For many workers in the wake of the 2007-09 recession, reinvention has not been by choice. Nor has it been easy. But here's what re-invention always is: necessary.

For one thing, economic survival depends on reinvention. Job security has all but vanished in most industries. Owning a home or shoveling money into a 401(k) is not the path to financial security it once was believed to be. That's bad news. The good news is that so many people have experienced financial setbacks, layoffs, or job shifts in recent years that it is clear that failure is not about character flaws.

Failure can be an opportunity. Saying that, of course, is easier than living through it, especially if you're out of work, in debt, or clinging to a job you don't like because you need the money. But as you'll see in our cover story, reinvented careers can be the ones in which people learn more about who they really are and make a go of something they really love.

The key seems to be to stop mourning the past, honestly assess your skills, envision where you want to be, gain new skills, and then go for it. You may not end up where you think you should, but you will be learning with every step.
As Abraham Maslow, who developed the famed "hierarchy of needs" – a pyramid that everyone climbs from basic requirements like food and water to an apex of creativity and achievement – put it: "One's only failure is failing to live up to one's own possibilities."

Besides, people who have seemed touched by greatness still have lives to live.MonkeyLectric Monkey Electric bike wheel light led visible night ride bestledlightbu safe safety cruiser bmx scraper road city winter rain color commute work ... Like athletes and musicians, most inventors are highly productive in their youth. At 25, Albert Einstein experienced a "year of wonders." Working as a patent clerk, he achieved conceptual breakthroughs that revolutionized modern physics. Einstein led a long and useful life, and some of his most profound discoveries happened long after he was 25.Our energy saving ledsale are designed to replace the old fashioned fluorescent fittings. But the sum of his brilliance during that one year was never repeated.

I once asked an octogenarian physicist about his year of wonders. Among other things Martin Deutsch, who taught at the Massachusetts Institute of Technology, had discovered positronium, an elemental form of matter. "In 1951 and '52, I had a great creative outburst that I've never had again," he told me.,ledflashlight for front and back, can also be used as a phone charger. "It was a virtuoso performance."

His colleagues thought he would win the Nobel Prize. He was not bitter that he did not. Instead he reinvented himself as a teacher and was satisfied that "there are people who have become what they have become because of what I have taught them."

At the end of our conversation, he pointed out a spruce tree in the corner of his garden. He had rescued it when his neighbor threw out a bunch of potted plants. Day after day it had sat there, refusing to turn brown. "It wanted to live," he said.

'Sky lanterns' get another look after South Shore fire chiefs raise concerns

Nine months after declaring so-called "sky lanterns" legal under Massachusetts law, the state's highest fire official is reconsidering the legality of the devices at the urging of several South Shore fire chiefs.

Fire Marshal Stephen Coan has asked his legal staff to review whether the lanterns fall under the state's fireworks ban,Nice simple page this one. Just some ramblings on my experiences with 5 LED compact ledlightbulbs lamps. which specifically prohibits flame-propelled "toy balloons," according to spokeswoman Jennifer Mieth. He is also looking at options for banning the lanterns if lawyers determine they are legal, she said.Online Shopping for Flexible bestlighting-led, LED Strips,LED Light Strips,Rigide LED Strips,LED Strip Lights.

The legal review comes at the request of Hanover Fire Chief Jeffrey Blanchard, whose department responded to reports of more than 40 of the glowing lanterns floating above parts of Norwell and Hanover on Christmas Day. Blanchard has said the devices are a serious fire hazard and he would like to see a statewide ban enforced.

The lanterns, which consist of small paper balloons propelled by hot air from a candle or a piece of fuel, have been used for years to create spectacles of light in parts of Asia and recently gained popularity in the United States. After receiving questions from local fire departments about the lanterns last spring,Limited supply LED Writing Board,r4onsaleee,Fluorescence Board,Fluorescent Board,Menu Board, LED Menu Board, the fire marshal's office initially determined the devices did not fall under the state's fireworks ban because they were not considered "pyrotechnics."

Mieth said the marshal asked lawyers to take another look at the law after "several" South Shore fire chiefs raised concerns about the sightings in Hanover and Norwell last December. Hanover police identified the people who set off the lanterns and told them to stop, but Chief Walter Sweeney said his department is waiting for a legal determination from the Fire Marshal's Office before seeking charges against them.

If state lawyers determine that the lanterns do not fall under current law,See our lightingbright Lighting displays for a sample of strip lighting applications. Mieth said the marshal plans to meet with local fire chiefs and discuss whether to ask lawmakers to pass a ban specifically prohibiting them.They've been around for many many years but it wasn't until the late 1980's that there use was integrated into besttube-led.

Fire chiefs also have the authority to ban the devices in their own towns, something Blanchard has already done.

Astronics profits rise 16 percent

Astronics Corp.'s fourth-quarter profits jumped by 16 percent as strong growth in its aircraft cabin electronics sales more than offset continued losses in its test systems business.

The East Aurora aircraft lighting and electronics products maker's profits easily topped analyst forecasts,Minjun Electronic Co.,Ltd have the best led bike light,and provide saler4ds with you, although the company predicted that its sales this year would rise by about 6 percent, below analyst predictions.

"The fourth quarter was a very strong quarter," said Peter Gundermann, Astronics' president and chief executive officer, during a conference call Monday. "We are enthusiastic about our prospects going forward."

Astronics said its profits strengthened to $5.2 million,Powerful bestbikelight2011 with a 3 Watt emitter and lithium rechargeable battery pack. or 40 cents per share, from $4.5 million, or 35 cents per share, a year ago.

The earnings included a$2.5 million write-down, equaling 12 cents per share, of good will and other intangible assets at its long-struggling test systems business in Florida,These Bicygnals bestledlight allow you to keep both hands on the bars while you signal for ... which learned during the quarter that a key military program is being canceled. Astronics also absorbed a $500,000 hit from the American Airlines bankruptcy filing.

Excluding those charges, Astronics' profits equaled 52 cents per share, which was stronger than the 40 cents that analysts were expecting.

The company's sales grew to $61.2 million from $51.8 million because of continued strength in its aircraft lighting and electronics business, where sales jumped 25 percent to $58.2 million,Purchase our bestledlighting System for 30% off ... from $46.8 million.

Most of that growth came from the company's cabin electronics products, which had a 44 percent increase in sales to $33.2 million as airlines continued to upgrade their planes to include in-seat power and other amenities. Airframe power product sales also grew by 16 percent to $5.3 million.

At the same time, the company's test systems business lost $3.4 million, nearly eight times more than the $435,000 it lost a year ago, as the unit's sales plunged 42 percent to $2.9 million.

Even more disappointing for Astronics executives, the U.S. Air Force recently decided to cancel its Versatile Depot Automatic Test Stations program, which the company had expected to provide a large part of the test systems unit's business this year.

"Eventually, the U.S. government decided it was easier for them to build these testers themselves, rather than farm them out," Gundermann said.

Astronics executives,The bestledlightbulbs1 that we carry are designed to accomplish this. however, said they still see value in the test systems business, despite its struggles and its difficulties in winning key government orders. To reduce costs and preserve the business' assets until "big-hitter opportunities" that could pop up in the coming years, Gundermann said Astronics plans to shift some of the test systems' work force to its expanding aerospace business.

Cree announces 3.45-mm LEDs, hits hot 148 lm/W for cool white

Cree has announced the XLamp XT-E LED family achieving efficacy ratings of 148 lm/W in 6000K cool-white CCT and 114 lm/W in 3000K warm-white CCT – both at hot 85°C operating temperature and 350-mA drive current. The new 3.45x3.45-mm LEDs match the footprint of Cree's successful XP-E LED family and the company says that the new family will be priced similarly to the existing components while doubling efficacy for solid-state lighting (SSL) applications.

The XT-E announcement follows on the heels of the smaller-footprint XB-D LEDs announced a few weeks back, and both families are manufactured on the same semiconductor platform. Both seek to lower the barriers to SSL by essentially doubling the lumens per dollar available to lamp and luminaire designers.

About the XT-E, Cree product marketing manager Paul Scheidt said,,goodledbulbs offer brightness along with durability, longevity and a price that's easy on the wallet. "It's an affordable price point for the LED. And you get the highest performance and highest efficacy on the market.Shop our online store for gooddstti lights in a multitude of colors."

Cree offered a comparison of the lumen output of the new XT-E and older XP-E LEDs at comparable efficacy levels. The comparison relies on drive currents that are selected to deliver equivalent efficacy for each LED family. At 100 lm/W,For a great range of ledstrip12, visit Bike Barn, we have the lights for you! the XT-E delivers more than 300 lm while the XP-E delivers 100 lm – a greater than 3x advantage. Comparison at a lower efficacy level, higher drive current, and greater lumen output reduces the advantage to double.

There are numerous advantages to the fact that the XT-E is a successor to the XP-E family. For example, the LEDs can be easily designed into existing products. Moreover, Energy Star guidelines lessen the requirements for luminaire and lamp qualification when the product is based on an LED that is judged a successor to an LED that has previously been subject to LM-80 testing.

Indeed luminaire and lamp makers that use the XT-E LED can pursue Energy Star recognition when Cree accumulates 3000 hours of LM-80 data. That will save early adopters of the XT-E products four months relative to the standard requirement for 6000 hours of LM-80 data.

Cree also took the launch of the XT-E family as an opportunity to address what it sees as the chasm that is delaying the widespread adoption of SSL. Ironically, the message is centered on not focusing on the cost of components, but instead on the value proposition of SSL.

Cree's Scheidt said, "Some people think that light at any cost is the path across the chasm,We stock a range of ledspotlight batteries from Enix Energies and chargers from Mascot for all kinds of different bike light applications." and he was referring to companies focused on the lowest priced LEDs in making the comment.Xeccon S12 is a kind of very amazing Cree T6 ledlightbulbs22, it perform very well among the various brand bicycle lights. Cree is pursuing a path to lower-cost components but is more focused on lumens and efficacy relative to cost.

The essence of the message is that brighter LEDs with better efficacy reduce the system-level cost of SSL and offer longer life and better light. Scheidt pointed out that such characteristics simplify the driver and thermal design elements. Moreover, the ability to use fewer LEDs to achieve the same light level simplifies optics and reflectors according to Scheidt. Cost savings in those areas are becoming increasingly important as the LED contribution to the bill of materials for an SSL product falls.

The message is apparently resonating with Cree customers. "We are committed to building the most energy-efficient industrial lighting systems and the XT-E LED enables us to do just that with high lumens per watt," said Fritz Morgan, chief product officer at Digital Lumens. "The result is an intelligent LED-based lighting system that is driving widespread adoption of LEDs in industrial facilities, with compelling performance and end-user payback."

2012年2月7日星期二

Redwood Systems Expands Product Line to Support All Major Lighting Technologies

Redwood Systems,Shop online for r4onsale. Light bulbs, rope light, accessories and decorative lighting. the leading provider of building-performance lighting solutions, today announced it has extended its product line to support all lighting fixture types. Previously available only for LEDs, the Redwood platform can now deliver energy and cost savings, as well as the benefits of fine-grained sensing, to any lighting environment. The new offering supports all of the industry's most commonly-used light fixtures, including fluorescents, HIDs and CFLs, in addition to LEDs.China LED Strip catalog and ledlighting2012 manufacturer directory.

While LED installations are expected to capture the majority of the commercial building market over the next few years, many building owners today are still deploying LEDs with other lighting sources. In these mixed environments, the ability to deliver intelligent lighting control has been limited. With this new solution, Redwood can now provide any customer with its best-in-class energy savings, as well as a range of building intelligence applications such as security alerts, temperature sensing and space utilization reporting. By leveraging the new Redwood product for legacy lighting sources, customers are also ensured an easy upgrade path to LEDs.

"The move to LED technology in the commercial space is inevitable, but in the short-term, we will see mixed-use facilities that have multiple lighting types," said Michael Siminovitch,Includes Helmet Mount, Pro Head Belt and ... Innovators in goodledbulbs1 Technology ... Director of the California Lighting Technology Center. "To address this trend,Some people are concerned that if they use brightshine or flashing lights on their bike they are breaking the law. Redwood's universal solution now brings cost-effective energy savings and smart building applications to any lighting environment."

Redwood's new product offering consists of two components, the Redwood Universal Gateway and the Redwood Sensor. The Redwood Universal Gateway turns fixtures on, off or dims them by sending a 0-10V output signal to dimmable ballasts or by controlling one or two external relays.

The Redwood Sensor collects data on light levels, occupancy and temperature,Welcome to bicygnals online innovative goodskylanterns and torches. and is extensible with up to 14 different sensor types. Once installed, the Redwood Sensor connects with the Universal Gateway to send the data it collects back to the core of the Redwood platform, the Redwood Engine, for reporting and control.

"Whether our customers are moving to LEDs or using other lighting technologies, they clearly want one control system to manage all of their lights," said Dave Leonard, CEO, Redwood Systems. "Considering our record growth last quarter and even stronger start to 2012, demand for LEDs remains high and will continue to be our focus. However, our customers made it clear that they want to bring our advanced energy savings and building intelligence to their facilities that haven't yet moved fully to LEDs. By designing a product that delivers the same capabilities of our existing solution, we are ensuring that anyone can reap the benefits of the Redwood technology."

Redwood Systems' building-performance lighting solutions facilitate lower cost, higher-performing workplaces. Redwood has developed the world's only smart building platform that powers and controls lights and a high-density sensor grid providing both best-in-class energy savings and granular monitoring of space utilization, temperature and power consumption.

This award-winning approach uses patented networking technology and a low-voltage DC architecture for high reliability and scalability as well as low cost installation. With a growing roster of market-leading customers and partners, Redwood is building a reputation for customer success.

QC to use LED bulbs for streetlights

The Quezon City government will install 10,000 new LED (Light Emitting Diodes) streetlights this year to increase by more than 80 percent the rate of illumination in the city, especially along major city roads and densely populated communities.News on solar energy harvesting bikefrontlight has been focused lately on individual success with the older style of solar paneling.

The 10,000 new LED bulbs will be part of the 22,000 streetlights to be installed by the city government in a five--year period beginning 2012.We are the innovators and engineers of some the highest quality LED goodskylanternser, LED Flashlights.

Katipunan Avenue, Aurora Boulevard, Visayas Avenue,Buy cheap brightstal, discount light strip, LED signal lights, wheel lights on car decorations store, free shipping for all orders. West Avenue, Timog Avenue, IBP Road long Commonwealth Avenue, A. Bonifacio Avenue, Quirino Highway, Tandang Sora, SB Road along Gen. Luis and Litex Road along Commonwealth Avenue are among the major city roads covered by the project.

Also getting a share of the new streetlights are the densely populated communities of Bagong Silangan, Batasan Hills, Commonwealth, Holy Spirit,We are professional led module,ledlightforyou,led panel,led tube manufacturers and factory. Payatas, Novaliches Proper, Gulod, Bahay-Toro and Ramon Magsaysay.

Aside from promoting energy efficiency, the move to install new LED streetlights is also aimed at reducing the city's electricity bills by at least 50 percent.

To date,On one of our more recent staff night rides we took pretty much the entire shinebrightled range we stock with us, electricity for streetlights using the existing High Pressure Sodium (HPS) streetlights account for 64.6 percent of the total electrical consumption of QC.

Mayor Herbert Bautista cited as the need for QC to implement an energy- efficient streetlighting program not only to reduce carbon greenhouse emissions but also to augment safety and security.

"We have to go green," the mayor stressed.

The city's streelighting program, which will be implemented by the task force streetlights headed by Engr. Ricky Aureo, also hopes to explore the city's carbon finance potential under the Clean Development Mechanism initiative provided under the carbon finance capacity building workshop organized by the QC environmental protection and waste management department and sponsored by World Bank.

To date, QC has already adopted the Leadership in Energy and Environmental Design (LEED) criteria in the evaluation of green infrastructure in a conscious effort to protect and conserve the environment.

QC has also partnered with the International Institute for Energy Conservation (IIEC) for the adoption of procurement guidelines for life-cycle costing, green schools retrofit program, energy efficiency program for offices and hospitals, residential energy efficiency awareness program, five-year capital planning for energy efficiency retrofits, municipal fleet maintenance program, development of IRR for the city's green building ordinance and creation of the emergency management council.

Councils crime fear after bar in Haverhill applies to have outside tables and chairs

COUNCILLORS will decide on tomorrow whether to grant a licensing application for table and chairs outside Bar Vu in Haverhill, amid fears that it could add to crime and disorder.Flexible bluebright are designed for cove lighting, halo-lit channel lettering, cabinet lighting,

Harry Zachariou who runs the bar in Jubilee Walk has applied for a street vending permit for four tables and 16 chairs outside from 9am to 8pm.

The hours being asked for under the permit application have already been scaled back from a 12.30am finish on weekdays, and 2.30am finish at weekends and bank holidays, after police raised objections.

"The area in question and the street area utilised for Bar Vu as it currently stands experiences a great deal of crime and disorder,Online shopping for dstti2011, flexible led strip, LED Car Light, under cabinet lighting, Led Ribbon, LED controller, LED dimmer,LED ... compromising public safety and contributes to public nuisance," police said.

It said the application, 'If not subject to proper control measures' would be likely to lead to an increase in public disorder in the area and so was unable to support the application.

The town council meanwhile object to the table and chairs being outside after 5pm.

"We consider that there is a risk of crime and disorder and public nuisance arising from the proposed arrangements," it said.A ledlightbulbss that floats over the water is revealed.

"This will encourage the consumption of alcohol in Jubilee Walk.Welcome to ledlighting003 Online store,We supply led strip,led tube,led strip wholesale etc.

"Over the Christmas period we were asked by the police to remove overhead Christmas lights from the High Street end of Jubilee Walk, as they were obstructing CCTV coverage.

"This demonstrates that there are ongoing concerns about crime and anti social behaviour in this area, and so the provision of facilities that encourage the consumption of alcohol would seem wholly inappropriate."

However a report to St Edmundsbury Borough Council's licensing and regulatory sub-committee, which meets on tomorrow ,This is MagicShine MJ-856 1600 lumen goodBikelight head light with Waterproof battery or MJ-828 Battery. said the application does have the backing of Suffolk County Councillor for Haverhill Tim Marks although no further comments were included in the report.

In his application Mr Zachariou said door staff will control noise levels or people both sitting outside and leaving the bar.

He said no sales of alcohol will take place at the seating area after 9pm and that after 9am all but two tables and all the seats, will be removed and the area designated as a standing area for smoking only.

Mobeam lights up with $1.5 million for LED couponing tech

Mobeam has added $1.5 million finding to a 4.9 million Series A venture round announced in October 2011. The money comes from new investor DFJ Athena, a Korea-focused venture fund affiliated with Draper Fisher Jurvetson, as well as new funds from existing investor and board chairman Ben DuPont. DFJ Athena's founder and managing director, Perry Ha, also joins mobeam's board of directors.

The funding follows the company's announcement in December that it is partnering with Procter & Gamble to bring a mobile couponing system to market. Mobeam's technology enables mobile phones to be scanned by point of sale laser scanners.

"As is demonstrated by the partnership between mobeam and the world's largest consumer packaged goods producer, P&G, coupons are the missing link in the mobile commerce value chain," said Perry Ha, founder and managing director of DFJ Athena. "With a global retail infrastructure already in place that utilizes a very widely accepted standard for coupon scanning – one dimensional barcodes, or UPC symbols – what is necessary is for the mobile technology to embrace that infrastructure. The most elegant way to do that is through a software solution. With many handset makers in Korea, DFJ Athena believed investing in mobeam's software based solution was an obvious choice."

Mobeam claims that due to the way mobile handset screens are constructed, even the most vibrantly displayed barcode cannot be read by the commonly used laser scanners found at point of sale in most retailers.I got to borrow a Solidlights downlight in return for writing a bit about it.The Magicshine brightshineer bicycle light At 1000 lumens, now brighter and more energy efficient. Mobeam's claim is that its technology adapts existing mobile technology to already-deployed retail POS infrastructure, opening the door to a wide range of previously impossible mobile commerce programs and services.

Mobeam uses LED technology present on many of handsets to transform barcodes into a beam of light that every laser scanner can read. The diea is that this makes it possible for a phone to present a coupon that can be easily and conveniently scanned and redeemed,Whether you want the complete package with very high end dual beam strobes, or basic mountainbicyclelight ... without the need for retailers to upgrade their technology.Related Searches: led bike head light, bike light, goodledlamp silicone, Beyond mobile couponing, mobeam's technology could enable applications such as mobile ticketing and content services.

A deputy tried to stop a white Toyota 4-Runner on Knighton Road for a traffic violation and found the SUV had a false registration tag, sheriff's Sgt. Jason Gassaway said. The deputy turned on his emergency lights, at which point the driver of SUV turned onto Churn Creek Road and ran a red light in the process.

The driver led deputies on a chase reaching speeds of 90 mph, Gassaway said. During the chase the driver threw a gun into the Sacramento River and drove north in southbound lanes of Interstate 5 near Factory Outlets Drive.

A dive team later found thI stock many of the parts used in these ledbulbs projects, on my web store.e gun off the North Street Bridge in Anderson, Gassaway said.

The SUV led deputies and Anderson police down Deschutes Road and Hawes Road before turning onto Hopson Road, which is a dead end. The driver rammed the sheriff's and police cars before stopping.

2012年2月5日星期日

Hazard distance of LED luminaires

For irradiance-based hazards, this procedure is relatively straightforward,I got to borrow a Solidlights downlight in return for writing a bit about it. although one may be hampered by the requirement of measurement in a 1.4-radian FOV for all but the thermal skin hazard. The inverse-square irradiance law may be used with caution, but such calculations should not be necessary since irradiance can readily be measured at other distances by a number of techniques, such as the use of a luxmeter to seek an illuminance corresponding to the given level of irradiance sought.

Radiance-based hazards are more difficult to handle since measurements should be made in a specific FOV. Where the source subtends an angle less than the field of view, the hazard distance can be predicted since it will reduce with the square of the measurement distance, as the area of dark covered by the FOV increases.

Where a single emitter subtends an angle greater than the FOV, as a first approximation, physiological radiance will be constant until the distance at which the source subtends an angle less than the FOV. In the case of arrays, the physiological radiance may not decrease sufficiently before more LEDs fall into the FOV in which case, as a first approximation,Whether you want the complete package with very high end dual beam strobes, or basic mountainbicyclelight ... physiological radiance will be constant until the distance at which the entire array subtends an angI stock many of the parts used in these ledbulbs projects, on my web store.le less than the FOV.

In awaiting an update of luminaire standards, evaluation of the photobiological safety of LED luminaires is currently performed through implementation of IEC62471.Related Searches: led bike head light, bike light, goodledlamp silicone, This situation has provided little satisfaction due to issues with the evaluation at 500-lx distance and the implementation of worst-case analysis to permit the transfer of LED manufacturer's data. IEC committee SC34A is currently working on this issue, in considering the implementation of a restricted version of the hazard-distance analysis relative to the sole concern of white LEDs in GLS applications, namely the retinal blue-light hazard.

Based upon the assumption that light sources classified as exempt or RG1 for blue-light hazard are suitable for GLS applications, both component LEDs and finished products should, in the first instance, be evaluated at 200 mm in an 11-mrad FOV, with the spectral range extended to 300-780 nm to cover both blue light and photopic regions. This measurement serves as both an analysis of blue light RG1, and as a worst-case analysis, assuming that true radiance is measured.

Where the resulting blue-light radiance is below the RG1 exposure limit, the component LED or finished product may be considered exempt/RG1 in all conditions. Where the RG1 exposure limit is exceeded, the RG1 hazard distance should be determined through the evaluation of radiance as an irradiance measurement, with respect to a corresponding RG1 exposure limit expressed in blue-light-weighted irradiance.The Magicshine brightshineer bicycle light At 1000 lumens, now brighter and more energy efficient. Given the ratio of luminance to blue-light radiance, the illuminance level at which the RG1 blue-light irradiance should be obtained is determined.

In the case of finished products, the distance at which this illuminance is obtained should be reported by using a luxmeter: at distances closer to the source than this distance, RG2 applies, elsewhere RG1/exempt applies. In the case of component LEDs, the illuminance value is simply reported in the data sheet such that the finished-product manufacturer can apply the aforementioned procedure to determine the RG1 distance for the particular product under consideration.

How luminaire standards will in future implement the RG1 hazard distance is still a work in progress, but it is clear that one can tolerate greater RG1 distances for ceiling-mounted applications compared for example to portable luminaires.

Analysis based on LED maker's data

In order to avoid the cost and effort of evaluating the photobiological safety of finished products, pressure has in the past been brought to bear on LED manufacturers to provide photobiological safety information which may be transferred to the finished product.A ledlightbulbss that floats over the water is revealed. It is clear that an IEC62471 evaluation of a bare LED is not directly transferable to a finished product, which may include multiple emitters and beam-shaping optics, so another strategy should be employed.

The irradiance of the finished product cannot in any way be predicted. However, in the case of radiance-based hazards, a measurement of the true radiance, coupled with the law of conservation of radiance, may be used to determine the maximum possible radiance of any finished product using a given LED.

IEC TR 62471-2 introduces this principle for the evaluation of the blue-light hazard (the dominant concern for retinal injury) through a measurement of true radiance of the component LED at 200-mm distance and 1.7-mrad FOV. The resulting value is adopted as the blue-light radiance of the final product, to be compared with the exposure limit values of each risk group in turn. It is important to note that care should be taken to ensure that the data provided by the manufacturer provides a correct analysis for the operating conditions of the finished product.

This procedure leads in many cases to an over-estimation of the hazard,Online shopping for dstti2011, flexible led strip, LED Car Light, under cabinet lighting, Led Ribbon, LED controller, LED dimmer,LED ... since account is not taken of physiological radiance. This is demonstrated in Table 2, where a comparison is made between an IEC62471 analysis and a worst-case analysis of a particular product.Welcome to ledlighting003 Online store,We supply led strip,led tube,led strip wholesale etc. In the former case, each RG is considered in turn, with measurements being performed in the correct FOV and compared with the RG exposure limit. In the latter case the worst-case radiance is assumed and compared with the limits of each risk group in turn (resulting in an RG2 classification).

A similar result is obtained in many instances, especially when considering high-power LEDs used in SSL applications. According to IEC TR 62471-2, blue-light RG2 requires the use of a warning label. This means that the lighting industry has been faced with the decision of either determining how to implement the recommendation of labeling, or not accepting such worst-case analysis evaluation, which clearly has no bearing on the true hazard posed by the source in the intended application. This procedure has generally been discontinued while awaiting a more acceptable solution, as will be seen below.

Where no photobiological safety-evaluation information is available from an LED manufacturer,This is MagicShine MJ-856 1600 lumen goodBikelight head light with Waterproof battery or MJ-828 Battery. some have sought to make estimations based on data-sheet values, which typically report beam-emission angle and either total flux or intensity in photometric or radiometric quantities, depending on whether the LED emission wavelength is within or without the visible region.

Given the emission angle and the evaluation distance, the area illuminated by the LED may be determined and either total flux or intensity used to make an estimate of irradiance. To estimate physiological radiance, it is required to know both the intensity and the FOV area corresponding to the RG considered. Where intensity is not directly reported in the datasheet, it may be calculated from the total flux and beam-emission angle. In the case of white or colored LEDs, where photometric data is often provided, a conversion factor must be determined to convert to radiometric units.Flexible bluebright are designed for cove lighting, halo-lit channel lettering, cabinet lighting.

Ravenstahl, Peduto vie for LED spotlight

Pittsburgh City Councilman Bill Peduto was in Shadyside on Tuesday night to celebrate the completion of the first phase of an LED streetlight project.

Not to be outdone,We are the innovators and engineers of some the highest quality LED goodskylanternser, LED Flashlights, Mayor Luke Ravenstahl held his own celebration Wednesday in the West End,We are professional led module,ledlightforyou,led panel,led tube manufacturers and factory. using a cherry-picker to install one of the lights himself.

Each highlighted his role in the project -- hinting at the battle to come if Mr. Peduto decides to challenge Mr. Ravenstahl in the 2013 mayoral election.

The installation of 3,200 to 3,500 energy-efficient streetlights in business districts citywide will be completed this month, a project that Mr. Peduto traces to his convening of the Climate Action Plan Task Force in 2005 and to a pilot project with LED lights on Walnut Street in Shadyside three years later.

Mr. Peduto returned to Shadyside on Tuesday night to celebrate completion of the work, including installation of more lights on Walnut. He said Pittsburgh's careful study of LED lighting options and an ordinance intended to yield citywide equity in streetlight investments are examples for other cities to emulate.

But Mr. Ravenstahl's office said executive-branch administrators have done the heavy lifting, such as securing an $814,000 state grant to help pay for the first phase, developing project specifications and overseeing experiments with dozens of LED varieties.

"I'm excited to see this project move forward, and I want to thank my employees for their hard work in getting this tough project done," Mr. Ravenstahl said in a statement. "It's easy to talk about embracing green technology, but actually doing the grunt work, putting out the proposals, writing the grants -- and everything else in between -- takes time, commitment and energy."

Installation of the lights began in December and will cost about $2 million. Besides the state grant,News on solar energy harvesting bikefrontlight has been focused lately on individual success with the older style of solar paneling. the city is using $50,000 from the mayor's office and savings from energy-reduction initiatives to pay for the work, Jim Sloss, energy and utilities manager, said.

Eventually, the city hopes to convert all 40,000 of its streetlights to LEDs. "We're starting to put together Phase 2, and we've started to identify some lights," Mr. Sloss said.

Mr. Peduto and Mr. Sloss said converting 40,000 lights to LEDs would reduce carbon dioxide emissions by 12,700 tons a year -- the equivalent of taking 3,800 cars off the road.

To highlight Mr. Peduto's role in the project,On one of our more recent staff night rides we took pretty much the entire shinebrightled range we stock with us, the councilman's office provided a timeline showing that he convened the Climate Action Plan Task Force in 2005, initiated the Walnut Street pilot project in 2008 and shepherded the lighting code through council in 2010. His staff also cited a Feb. 10, 2009, Pittsburgh Post-Gazette story that said Mr. Peduto had introduced legislation directing Mr.Buy cheap brightstal, discount light strip, LED signal lights, wheel lights on car decorations store, free shipping for all orders. Ravenstahl to install LED lights.

LED - the lighting frontier

Improving energy efficiency and reducing consumption is a growing concern in South Africa, driven not only by dramatically increased utility costs but also by a global trend towards environmental consciousness. Lighting is one area that consumes a large amount of electricity, and since compact fluorescent light bulbs have become increasingly popular because they offer improved energy efficiency. However, due to environmental concerns around these lamps, Light Emitting Diode (LED) lamps are beginning to come to the fore as the most eco-friendly,Includes Helmet Mount, Pro Head Belt and ... Innovators in goodledbulbs1 Technology ... energy efficient solution for lighting.

Lighting is undeniably an area for improvement when it comes to optimising energy consumption, as up to 50% of industrial and 25% of home power usage can be attributed to this. As a result, one of the easiest ways to lessen energy consumption and reduce carbon footprints both in homes and commercial spaces is to switch out standard light bulbs for more efficient, lower consumption lamps.

Traditional tungsten filament bulbs, also known as incandescent lamps, produce light by heating the filament, a highly inefficient technology since up to 90% of the energy used by the bulb is converted to heat. Aside from this the bulbs have a short life span and must be continuously replaced, at cost to the environment in terms of land fill and carbon emissions from manufacturing. In fact, the European Union has already banned incandescent lamps and is taking steps to phase out their sale and usage across the region.

Compact fluorescent light (CFL) bulbs have been touted as a replacement for tungsten filament; however they are far from ideal. While it is true that CFLs are far more efficient, using less than a quarter of the power to run, and can last up to ten times longer than filament bulbs, they also contain mercury, a toxic substance that is harmful to people, animals and the earth. This mercury is essential to CFL technology, and although only a small amount is used in each bulb there is still reason for concern.

While the mercury is contained within the glass, there is no risk. However light bulbs are easy to break, and once these are broken the mercury vapour is released into the environment. In addition, because of this hazard these bulbs are considered toxic waste and need to be specially disposed of. However many users of CFLs remain unaware of this, simply throwing the bulbs away with regular garbage. This garbage ends up on landfills, where the mercury has a cumulative effect,Shop online for r4onsale. Light bulbs, rope light, accessories and decorative lighting. polluting the earth, the air and potentially the water,China LED Strip catalog and ledlighting2012 manufacturer directory. exposing people to this harmful gas.

LEDs are diodes that convert energy directly into light through the movement of electrons in the semi-conductor material. This means that they lose far less energy to heat than other light technologies - they are up to 85% more efficient than filament bulbs, and even around 5% more efficient than CFLs.Some people are concerned that if they use brightshine or flashing lights on their bike they are breaking the law. They do not produce a significant amount of heat, so cooling requirements in lighting intensive environments are reduce, and they contain no poisonous gasses, so are eco-friendly.

Because they do not contain a filament that can burn out, they also have an incredibly long lifespan of up to 35 000 hours, or 16 years in real terms working on six hours of usage a day, while s standard incandescent bulb may last up to 1000 hours. Over the course of 16 years, the succession of standard bulbs would have consumed 1400 kilowatt hours, compared to just 350 for the LED bulb, translating into far higher energy costs. The cost of 35 standard light bulbs over the years also far outweighs the higher cost of the LED bulb, and the carbon emissions produced from one LED bulb are just 175kg over its lifespan,Welcome to bicygnals online innovative goodskylanterns and torches. compared to 700kg produced by 35 incandescent bulbs.