LED Light Bulbs?
03-23-2009, 08:09 PM
#41
I feel the need...
A brilliant new approach
Light-emitting diodes will transform the business of illumination, especially with new production breakthroughs
http://www.economist.com/science/dis...fsrc=nwlgafree
“INCANDESCENT” might well describe the rage of those who prefer traditional light bulbs to their low-energy alternatives. This week, the European Commission formally adopted new regulations that will phase such bulbs out in Europe by 2012. America will do so by 2014. Some countries, such as Australia, Brazil and Switzerland, have got rid of them already. When a voluntary agreement came into force in Britain, at the start of the year, people rushed out to buy the last 100-watt light bulbs. Next to go are lower-wattage bulbs.
But what will replace the light bulb? Although obtaining illumination by incandescence (ie, heating something up) goes back to prehistory, it was not until 1879 that Thomas Edison demonstrated a practical example that used a wire filament encased in glass. Modern bulbs, the descendants of that demonstration, are cheap (around 50 cents) but inefficient, because only about 5% of the energy they use is turned into light and the rest is wasted as heat. A typical bulb also has to be replaced every 1,000 hours or so.
Without changing light fittings, the cheapest direct replacement for an incandescent bulb at the moment is a compact fluorescent light (CFL). These use up to 75% less power and last ten times longer, but they cost around $3 each. That price puts some people off, which explains part of the hoarding of incandescent bulbs. But others object not to the price but to the quality of the light, which has a different spectrum from the one they are used to. CFL bulbs can also be slow to reach maximum illumination. And some people worry that they may be bad for the health. Fluorescent lights use electricity to excite mercury vapour. This produces ultraviolet light that causes a phosphor coating inside the bulb to glow. The lights can flicker, which could set off epileptic fits, and badly made ones might leak ultraviolet radiation, and may thus pose a cancer risk. There are also concerns about the disposal of the toxic mercury.....
But what will replace the light bulb? Although obtaining illumination by incandescence (ie, heating something up) goes back to prehistory, it was not until 1879 that Thomas Edison demonstrated a practical example that used a wire filament encased in glass. Modern bulbs, the descendants of that demonstration, are cheap (around 50 cents) but inefficient, because only about 5% of the energy they use is turned into light and the rest is wasted as heat. A typical bulb also has to be replaced every 1,000 hours or so.
Without changing light fittings, the cheapest direct replacement for an incandescent bulb at the moment is a compact fluorescent light (CFL). These use up to 75% less power and last ten times longer, but they cost around $3 each. That price puts some people off, which explains part of the hoarding of incandescent bulbs. But others object not to the price but to the quality of the light, which has a different spectrum from the one they are used to. CFL bulbs can also be slow to reach maximum illumination. And some people worry that they may be bad for the health. Fluorescent lights use electricity to excite mercury vapour. This produces ultraviolet light that causes a phosphor coating inside the bulb to glow. The lights can flicker, which could set off epileptic fits, and badly made ones might leak ultraviolet radiation, and may thus pose a cancer risk. There are also concerns about the disposal of the toxic mercury.....
06-10-2009, 04:31 AM
#42
I feel the need...
Green Promise Seen in Switch to LED Lighting
To change the bulbs in the 60-foot-high ceiling lights of Buckingham Palace’s grand stairwell, workers had to erect scaffolding and cover precious portraits of royal forebears.
So when a lighting designer two years ago proposed installing light emitting diodes or LEDs, an emerging lighting technology, the royal family readily assented. The new lights, the designer said, would last more than 22 years and enormously reduce energy consumption and carbon dioxide emissions — a big plus for Prince Charles, an ardent environmentalist. Since then, the palace has installed the lighting in chandeliers and on the exterior, where illuminating the entire facade uses less electricity than running an electric teakettle.
In shifting to LED lighting, the palace is part of a small but fast-growing trend that is redefining the century-old conception of lighting, replacing energy-wasting disposable bulbs with efficient fixtures that are often semi-permanent, like those used in plumbing.....
So when a lighting designer two years ago proposed installing light emitting diodes or LEDs, an emerging lighting technology, the royal family readily assented. The new lights, the designer said, would last more than 22 years and enormously reduce energy consumption and carbon dioxide emissions — a big plus for Prince Charles, an ardent environmentalist. Since then, the palace has installed the lighting in chandeliers and on the exterior, where illuminating the entire facade uses less electricity than running an electric teakettle.
In shifting to LED lighting, the palace is part of a small but fast-growing trend that is redefining the century-old conception of lighting, replacing energy-wasting disposable bulbs with efficient fixtures that are often semi-permanent, like those used in plumbing.....
06-10-2009, 09:42 AM
#43
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i dont know about these LED bulbs, the light coming out of it just doesnt seem as bright and color temp of an incandescent bulb. 
06-11-2009, 12:48 PM
#44
The sizzle in the Steak
^^ You are correct.....the current ones are too "cold"....but within a few years it will be easier to produce "warmer" light at a cheaper cost. LED lighting is the future...and in the commercial sector it's already common.....residential LED lighting is right around the corner.
The incad. bulb is dead....and the fluor. bulb is dying.
The incad. bulb is dead....and the fluor. bulb is dying.
06-11-2009, 12:55 PM
#45
it's me, Alan Rickman.
08-18-2009, 06:10 PM
#46
I feel the need...
The LED Illumination Revolution
Apparently, it's time to ban Edison's venerable, now vilified, light bulb. European leaders, green pundits and the widely reported light bulb provisions of the U.S. Energy Independence and Security Act of 2007 all urgently push the abandonment of incandescent bulbs.
The plan appears to be to convince everyone to switch to compact fluorescent lights (CFL), a technology that was introduced in the 1930s and perfected when rock was young and computers used vacuum tubes.
What irony. Here we are, in the 21st century, with a semiconductor revolution in lighting around the corner. Semiconductor light emitting diodes (LEDs) are finally on the verge of having the capability to radically alter the entire lighting landscape with staggering improvements in both lighting efficiency and efficacy....
The plan appears to be to convince everyone to switch to compact fluorescent lights (CFL), a technology that was introduced in the 1930s and perfected when rock was young and computers used vacuum tubes.
What irony. Here we are, in the 21st century, with a semiconductor revolution in lighting around the corner. Semiconductor light emitting diodes (LEDs) are finally on the verge of having the capability to radically alter the entire lighting landscape with staggering improvements in both lighting efficiency and efficacy....
08-18-2009, 06:33 PM
#47
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I still prefer the light and warmth of incadescent lighting 
not too much experience with LED thou
not too much experience with LED thou
08-18-2009, 06:47 PM
#48
The sizzle in the Steak
^^ LED will be able to match the warm light of incad.
08-18-2009, 10:15 PM
#49
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is there a lag/warm up time like CFLs?
do i have anything to worry about with LEDs, like how if you break CFLs you have to deal with mecury. ?
and when will they match the warmth of incad?
do i have anything to worry about with LEDs, like how if you break CFLs you have to deal with mecury. ?
and when will they match the warmth of incad?
08-19-2009, 11:24 AM
#50
The sizzle in the Steak
The warmth of incad can and will be reproduced by LED.....it's a matter of cost at this point.
No mercury in the LED.....it's much better for the environment versus CFL.
LED is a win, win, win.
No mercury in the LED.....it's much better for the environment versus CFL.
LED is a win, win, win.
08-19-2009, 07:22 PM
#52
I feel the need...
LED tech is progressing to the point where it can match the color warmth of incand WITHOUT the wasteful heat. Its a matter of scale to get the cost down. 
08-20-2009, 12:08 AM
#53
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well if thats the case about LED, cant wait.
just not sure about the light that comes out of an LED bulb, dont they shine in 1 direction? or something like that.
just not sure about the light that comes out of an LED bulb, dont they shine in 1 direction? or something like that.
09-24-2009, 07:04 PM
#54
I feel the need...
Is This the Light Bulb of the Future?
Philips, the Dutch electronics giant whose products range from clothes irons to medical equipment to light bulbs, believes that it’s about to become $10 million richer.
That’s the value of a prize the company thinks it will win with its entry in the L Prize, a U.S. Department of Energy contest to create a viable LED-based alternative to a 60-watt light bulb.
Philips announced today that it is the first company to submit an entry in the contest. The company has first-mover advantage, because if their lamp is shown to meet the rules, then Philips wins, even if another company enters later with better results.
In May 2008, the Department of Energy announced that it would award $10 million to the first company that developed a solid-state lamp that could replace a standard bulb. Among the criteria: The lamp can use no more than 10 watts to create the equivalent light of a 60-watt incandescent bulb; the color of the light output must mimic that of today’s incandescents; and the bulbs must last at least 25,000 hours, as much as 25 times as long as today’s standard bulbs.....
That’s the value of a prize the company thinks it will win with its entry in the L Prize, a U.S. Department of Energy contest to create a viable LED-based alternative to a 60-watt light bulb.
Philips announced today that it is the first company to submit an entry in the contest. The company has first-mover advantage, because if their lamp is shown to meet the rules, then Philips wins, even if another company enters later with better results.
In May 2008, the Department of Energy announced that it would award $10 million to the first company that developed a solid-state lamp that could replace a standard bulb. Among the criteria: The lamp can use no more than 10 watts to create the equivalent light of a 60-watt incandescent bulb; the color of the light output must mimic that of today’s incandescents; and the bulbs must last at least 25,000 hours, as much as 25 times as long as today’s standard bulbs.....
09-24-2009, 10:18 PM
#55
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cant wait.
09-24-2009, 11:39 PM
#56
The sizzle in the Steak
It better be a lot less than 10 watts.....a 60w (light) CFL can do it for 13W
09-25-2009, 09:35 AM
#57
Oliver!!!
Even if it is 10w, I'd still trade out my 13w CFL for it. If for no other reason than the lack of warmup time. Don't get me wrong, I like my CFLs. I don't feel bad about having 2 lights on timers that come on every night. And I made sure to buy all Mercury free bulbs, so I don't have to worry about the environmental consequences. That warm up lag drives me nuts though!
09-25-2009, 12:11 PM
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The lag time and color temp of cfls that bother me.
09-25-2009, 12:14 PM
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Question about LEDs, do they cycle like flourescent lighting?
09-29-2009, 10:39 PM
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thanks, thats good to hear, because even thou you cant see it cycling it makes you feel more tired imo.
12-01-2009, 07:26 PM
#62
I feel the need...
LED Bulbs Save Substantial Energy, a Study Finds
....Dr. Wessler expects the results to shift even more in favor of LEDs, as newer generations of that technology become even more efficient, requiring less energy to produce the same amount of light.
“Everything I’ve seen strengthens the assumption that LED efficiency will increase,” she said. “There has not been much improvement in incandescent efficiency in the last 10 years.”
“Everything I’ve seen strengthens the assumption that LED efficiency will increase,” she said. “There has not been much improvement in incandescent efficiency in the last 10 years.”
12-01-2009, 09:40 PM
#63
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So when is that bulb from Philips going to be available to buy??
12-02-2009, 12:48 AM
#64
Evil Mazda Driver
CFLs can go suck a fat nut. My dad loves those damn things and I HATE them with a fiery passion...they take forever to warm up, whine and buzz and contain mercury. I'm going to stockpile light bulbs until I can get me some good-looking LEDs that have the same warmth as the bulbs.
05-13-2010, 05:50 PM
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So I guess those bulbs from philips are going to be available 4thQ 2010 for a whooping $60 bux a bulb 
05-13-2010, 11:04 PM
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id get those $20 home depot light bulbs, but they're only meat to replace 40W bulbs
05-17-2010, 06:07 PM
#67
I feel the need...
LED Bulbs for the Home Near the Marketplace
The prospects of replacing today’s inefficient incandescent light bulbs with long-lasting, low-power LEDs are increasing.
Two of the lighting industry’s three biggest manufacturers, Osram Sylvania and Philips, plan to sell energy-efficient LED bulbs this year that can replace a 60-watt bulb, the most commonly used incandescent lamp.
The third company, General Electric, will sell an LED equivalent to a 40-watt bulb this year, but it will not have a 60-watt replacement ready until 2011.
Beginning in January 2012, federal law will require that light bulbs, or lamps as the industry calls them, will need to be 30 percent more efficient than current incandescent bulbs. Standard incandescent lamps will most likely not be able to meet those requirements. LED makers hope their bulbs will......
Two of the lighting industry’s three biggest manufacturers, Osram Sylvania and Philips, plan to sell energy-efficient LED bulbs this year that can replace a 60-watt bulb, the most commonly used incandescent lamp.
The third company, General Electric, will sell an LED equivalent to a 40-watt bulb this year, but it will not have a 60-watt replacement ready until 2011.
Beginning in January 2012, federal law will require that light bulbs, or lamps as the industry calls them, will need to be 30 percent more efficient than current incandescent bulbs. Standard incandescent lamps will most likely not be able to meet those requirements. LED makers hope their bulbs will......
05-17-2010, 08:47 PM
#68
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yea, but the offering from Philips is $60!! geez!
i mean yea its supposed to be able to last up to 22 years, but im sure the upfront cost is going to scare away people from investing in them.
i just recently replaced a light fixture with some 40W decorative style CFLs. suckers cost me like $20 at home depot.
with regular incandescent i could have replaced the entire house and have some change.
i also tried to find the Home Despot Ecosmart 40W replacement LED bulbs for $20, but couldn't find them on Sunday
http://www.homedepot.com/Lighting-Fa...atalogId=10053
http://www.engadget.com/2010/05/11/t...with-20-bulbs/
i mean yea its supposed to be able to last up to 22 years, but im sure the upfront cost is going to scare away people from investing in them.
i just recently replaced a light fixture with some 40W decorative style CFLs. suckers cost me like $20 at home depot.
with regular incandescent i could have replaced the entire house and have some change.
i also tried to find the Home Despot Ecosmart 40W replacement LED bulbs for $20, but couldn't find them on Sunday
http://www.homedepot.com/Lighting-Fa...atalogId=10053
http://www.engadget.com/2010/05/11/t...with-20-bulbs/
05-18-2010, 06:39 PM
#69
The sizzle in the Steak
LED price will come down when they become more mainstream...the same way the CFL did.
05-19-2010, 09:18 AM
#70
Team Owner
I'm not paying $20+ for a light bulb. Although I once said I'm not going to pay $3 for gasoline. 
05-19-2010, 11:12 AM
#71
i also tried to find the Home Despot Ecosmart 40W replacement LED bulbs for $20, but couldn't find them on Sunday
http://www.homedepot.com/Lighting-Fa...atalogId=10053
http://www.homedepot.com/Lighting-Fa...atalogId=10053
05-19-2010, 01:03 PM
#72
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09-14-2010, 03:36 PM
#74
The sizzle in the Steak
^^ At 20 bucks a pop....why would you buy them at this price point?
09-16-2010, 08:10 PM
#76
I feel the need...
I bought some LED floodlights for supplemental lighting in the basement when Costco was carrying them a while back. Dunno why they stopped.
Can't wait for LED's to scale up.
Can't wait for LED's to scale up.
09-20-2010, 08:33 AM
#77
Wow, so many internet experts here, so much misinformation and misguided opinions.
LED has a long way to go before its a viable option. The return on investment in commercial applications is calculated out to approximate 15 years(!) due to the high cost of up front purchase and installation. Before you jump on the LED bandwagon you need to really understand what they are and how they work. They are some of the LEAST environmentally freindly lighting products available. When they fail (and they do, often times far in advance of their advertised life cycle based on independent testing agency results), they are not much above toxic waste and must be disposed of responsibly (and typically at a cost). The binning process of providing a tight range of comperable light output and color temperature is currently such a wide standard there have been many many problems where long runs of these fixtures are installed due to drastic inconsistency in color temp and light output even when from the same "bin". The current ANSI standard for binning is extremely wide and leaves the door wide open for horrible looking installations. The standard is the MacAdam Ellipse step method. Human eyes can detect 3-step differences in most cases. The current ANSI standard is 7 steps! if you ever get a chance to see 2 LED lights side by side that are even 4 steps apart, you will notice instantly.
LED colors are still a very mixed bag. Infact there is no such thing as a white LED (currently). White LED is created by placing a phosphor coating on top of a blue LED...it is not repairable or restorable should it begin to fail so you have to replace the entire fixture in most cases. Color mixing "white LED" with a combination of red/green/blue is also another method but is not as consistent as other types of light sources, not even close.
Light distribution is also typically poor with LED. LED is very narrow in its light distribution. Other light sources (CFL, Halogen, Incandecent) all have 360 degree distribution. side by side, as an example, the lumen output of LED is substantially less than a fluorescent T8 bulb due to the fact the T8 gives light output on its entire surface. LED efficacy is also generally lower.
Another factor is the heat produced by LED. LED fixtures, especially recessed, require a large heatsink. Your ceiling cavity now becomes another zone of air and at least in commercial applications at this point, this can cause the need for additional cooling capacity above the ceiling.
LED also has issues with glare. The fixtures place the light all the way at the surface typically which means your eye actually sees the luminare. In typical recessed light fixtures, the luminare is higher and tucked away and as a result the light is softer with significantly less glare
There is a lack of consistency and regulation in the industry. Before you go out and buy LED, understand they are NOT created equal. Even by the same manufacturer. For unbiased testing, check out the DOE CALiPER test program
www1.eere.energy.gov/buildings/ssl/caliper.html
some performance values stated by manufacturers are overstatedby as much as 100%!!! buyer beware!!
Also familiarize yourself with IES - LM-79 and IES - LM-80 testing (lumen maintenance and absolute photmetry testing, respectively.)
The bottom line is that the romance some of you have with LED just based on the info provided by manufacturers and the general media is misguided, incomplete, and in some cases, gross misinformation.
LED is a light source of great potential but currently is still not on the level of the multitude of other light sources....
LED has a long way to go before its a viable option. The return on investment in commercial applications is calculated out to approximate 15 years(!) due to the high cost of up front purchase and installation. Before you jump on the LED bandwagon you need to really understand what they are and how they work. They are some of the LEAST environmentally freindly lighting products available. When they fail (and they do, often times far in advance of their advertised life cycle based on independent testing agency results), they are not much above toxic waste and must be disposed of responsibly (and typically at a cost). The binning process of providing a tight range of comperable light output and color temperature is currently such a wide standard there have been many many problems where long runs of these fixtures are installed due to drastic inconsistency in color temp and light output even when from the same "bin". The current ANSI standard for binning is extremely wide and leaves the door wide open for horrible looking installations. The standard is the MacAdam Ellipse step method. Human eyes can detect 3-step differences in most cases. The current ANSI standard is 7 steps! if you ever get a chance to see 2 LED lights side by side that are even 4 steps apart, you will notice instantly.
LED colors are still a very mixed bag. Infact there is no such thing as a white LED (currently). White LED is created by placing a phosphor coating on top of a blue LED...it is not repairable or restorable should it begin to fail so you have to replace the entire fixture in most cases. Color mixing "white LED" with a combination of red/green/blue is also another method but is not as consistent as other types of light sources, not even close.
Light distribution is also typically poor with LED. LED is very narrow in its light distribution. Other light sources (CFL, Halogen, Incandecent) all have 360 degree distribution. side by side, as an example, the lumen output of LED is substantially less than a fluorescent T8 bulb due to the fact the T8 gives light output on its entire surface. LED efficacy is also generally lower.
Another factor is the heat produced by LED. LED fixtures, especially recessed, require a large heatsink. Your ceiling cavity now becomes another zone of air and at least in commercial applications at this point, this can cause the need for additional cooling capacity above the ceiling.
LED also has issues with glare. The fixtures place the light all the way at the surface typically which means your eye actually sees the luminare. In typical recessed light fixtures, the luminare is higher and tucked away and as a result the light is softer with significantly less glare
There is a lack of consistency and regulation in the industry. Before you go out and buy LED, understand they are NOT created equal. Even by the same manufacturer. For unbiased testing, check out the DOE CALiPER test program
www1.eere.energy.gov/buildings/ssl/caliper.html
some performance values stated by manufacturers are overstatedby as much as 100%!!! buyer beware!!
Also familiarize yourself with IES - LM-79 and IES - LM-80 testing (lumen maintenance and absolute photmetry testing, respectively.)
The bottom line is that the romance some of you have with LED just based on the info provided by manufacturers and the general media is misguided, incomplete, and in some cases, gross misinformation.
LED is a light source of great potential but currently is still not on the level of the multitude of other light sources....
09-30-2010, 08:20 PM
#78
I feel the need...
Seeing as Obama and the Donkeys are mandating the obsolescence of incandescent bulbs, I am stocking up on a few crates so that the technology can catch up to the political winds. I will be selling extras on eBay with 500% mark-up in a few years. Shhhhhhh.....this is my best investment idea.
10-01-2010, 02:15 PM
#79
The sizzle in the Steak
Do you care to provide a link to your so-called expert opinion so that us mere mortals can be fully informed or are you funded by the CFL industry?
Seeing as Obama and the Donkeys are mandating the obsolescence of incandescent bulbs, I am stocking up on a few crates so that the technology can catch up to the political winds. I will be selling extras on eBay with 500% mark-up in a few years. Shhhhhhh.....this is my best investment idea.
Seeing as Obama and the Donkeys are mandating the obsolescence of incandescent bulbs, I am stocking up on a few crates so that the technology can catch up to the political winds. I will be selling extras on eBay with 500% mark-up in a few years. Shhhhhhh.....this is my best investment idea.
10-04-2010, 01:11 PM
#80
Do you care to provide a link to your so-called expert opinion so that us mere mortals can be fully informed or are you funded by the CFL industry?
Seeing as Obama and the Donkeys are mandating the obsolescence of incandescent bulbs, I am stocking up on a few crates so that the technology can catch up to the political winds. I will be selling extras on eBay with 500% mark-up in a few years. Shhhhhhh.....this is my best investment idea.
Seeing as Obama and the Donkeys are mandating the obsolescence of incandescent bulbs, I am stocking up on a few crates so that the technology can catch up to the political winds. I will be selling extras on eBay with 500% mark-up in a few years. Shhhhhhh.....this is my best investment idea.
Secondly, we live in America where not everything that a president backs is a good idea or even relevant.
I am not funded by anyone. In my particular line of work I have to pay alot of attention to all aspects of lighting and not just front end cost and energy consumption. The facts are the facts and as of now, LED lighting is catching on and it certianly offers energy savings, however in terms of quality of light, it is quite low on the scale. Some (read: most) people dont care, much less actually notice, that different types of light sources look different, feel different, etc. For any drone just looking to jump on the latest technology bandwagon, go ahead, your bus is leaving! But for those who prefer quality over the latest gimmick and a few bucks in energy savings over an extended period of time, tread with caution when it comes to LED...