โOct-25-2013 03:45 PM
โOct-28-2013 04:58 AM
โOct-28-2013 12:51 AM
โOct-27-2013 10:57 PM
โOct-27-2013 09:57 PM
Gdetrailer wrote:NinerBikes wrote:Gdetrailer wrote:ktmrfs wrote:
I have some LED recessed floods and they are bright, same color as halogens, dimmable, and very pleasing color rendition. (Costco had them). In fact, just for a comparison I left one 75W halogen in the kitchen and the other 9 floods were the LED. Walking into the room, it was very difficult to point out the one halogen. Brightness and color were very good.
Initially LED bulbs had 3 emitters, red, green, and blue with very narrow spectrum so no matter what, the color didn't appear very white. Some then added yellow to help but the same basic problem, 3 (or 4) very narrow spectral lines, not like "normal" light.
so, finally the solution. Use a phosphor coating like they do on floresent bulbs on the LED case surface. the LED excites the phosphor which then emits light at a variety of wavelengths, like a florescent bulb does. Now the spectrum is filling in and the output is much more like natural light. Couple that with varying the brightness of the 3 or 4 emitters and choosing phosphors and it is like floresents where you can make almost any color temperature you want pretty easily.
I suspect there is a very slight hit in efficiency, but more than made up for in the color of the light. And the CREE LED's seem to be continually improving in efficiency as well.
My prediction is that the LED's within one, maybe two years will be priced like the CFL's today and the CFL's will disappear quickly.
Not likely.
LEDs, especially WHITE LEDs have a long, long way to get to CFLs price points, LONGEVITY and potential brightness.
To me LEDs have been unreliable and costly, heck I can't even keep SIMPLE LED taillights and even marker lights working reliably for more than a couple of years on my RV.
My experience with 120V home LEDs has also been terrible, the longest lasting 120V LED bulb made it TWO MONTHS and it cost $20 :M, the shortest has been one week..
You also can not get super uber bright LEDs, you know something that competes more on 40W and above in incadescent but yet you can find lots of super bright CFLs which are in excess of 350W of incadescent brightness.
Take a good look at CFLs future, it is EXTREMELY bright...
85W CFL link
Specs are as follows..
85-Watt, 5200 Lumens, 80 CRI
350-Watt Incandescent Equivalent
10,000 Hour Average Lamp Life
6500K Color Temperature, Daylight Color, Medium Base
$27.95
To get a LED light to get close to that brightness you would literally have to buy 520 of the BEST LED lights costing you at the min of $2600 :E ($5 per 100 lumens).
That 85W CFL rocks, I put one in my garage last summer, used it last winter and this summer and so far is still working.
They make even brighter CFLs to boot.
$4.80 for 280 lumens at 700 Mah. 910 lumens @ 3.0 Amps. multiply x 5 for 4550 lumens... $24.
Cree xm-l T6 LED's
Hate to tell you.. but LED manufacturers OVER HYPE the Lumens ratings well in excess of TWICE the actual USABLE brightness. In other words the manufacturers are LYING. LEDs by the very nature have an extremely bright center spot, that is where they MEASURE the lumens. Other types lighting does not have the issue.
LEDs have a secondary drawback, they FADE in brightness, the manufacturers leave out the fact that IF the LEDs make it to the rated 100,000 hr mark they WILL be at less than half the original brightness.
My own experience with LEDs bears that out even in a short two month life of a LED light I had, before it burned out it was considerably weaker than when it was new. Started out as a 9W LED with a lumens rating of 40W but if you matched it to an incadescent bulb it was only as bright as a 25W incadescent when it was new. Before it burned out a 4W incadescent nightlight was brighter than the LED.
The manufacturers also are lying about the longevity of white LEDs, they are overdriving the LEDs to get the max brightness. In doing so they are SHORTENING THE LIFE of the LED.
I got sucked into the LED thing and got burnt, spend your hard earned money on them, it is yours to do so but I myself will not get caught up in LED frenzy again. Maybe in 20 yrs or so when they are mature but not now, they are still experimenting with YOUR hard earned money.
CFLs have been out since the 1980s, they are very mature and will continue to go on for years. Just recently I had to replace a 9W CFL I bought back around 1989, burned in our kitchen stove hood every night 365 a year, that is 24 yrs operating 8hrs every day, that's an outstanding 70,000 hrs! Not bad for something which is only rated for 10,000 hrs. Can't say that for the pitiful 9W LED light I had which only lasted a measly 480hrs.
โOct-27-2013 07:20 PM
โOct-27-2013 06:04 PM
NinerBikes wrote:Gdetrailer wrote:ktmrfs wrote:
I have some LED recessed floods and they are bright, same color as halogens, dimmable, and very pleasing color rendition. (Costco had them). In fact, just for a comparison I left one 75W halogen in the kitchen and the other 9 floods were the LED. Walking into the room, it was very difficult to point out the one halogen. Brightness and color were very good.
Initially LED bulbs had 3 emitters, red, green, and blue with very narrow spectrum so no matter what, the color didn't appear very white. Some then added yellow to help but the same basic problem, 3 (or 4) very narrow spectral lines, not like "normal" light.
so, finally the solution. Use a phosphor coating like they do on floresent bulbs on the LED case surface. the LED excites the phosphor which then emits light at a variety of wavelengths, like a florescent bulb does. Now the spectrum is filling in and the output is much more like natural light. Couple that with varying the brightness of the 3 or 4 emitters and choosing phosphors and it is like floresents where you can make almost any color temperature you want pretty easily.
I suspect there is a very slight hit in efficiency, but more than made up for in the color of the light. And the CREE LED's seem to be continually improving in efficiency as well.
My prediction is that the LED's within one, maybe two years will be priced like the CFL's today and the CFL's will disappear quickly.
Not likely.
LEDs, especially WHITE LEDs have a long, long way to get to CFLs price points, LONGEVITY and potential brightness.
To me LEDs have been unreliable and costly, heck I can't even keep SIMPLE LED taillights and even marker lights working reliably for more than a couple of years on my RV.
My experience with 120V home LEDs has also been terrible, the longest lasting 120V LED bulb made it TWO MONTHS and it cost $20 :M, the shortest has been one week..
You also can not get super uber bright LEDs, you know something that competes more on 40W and above in incadescent but yet you can find lots of super bright CFLs which are in excess of 350W of incadescent brightness.
Take a good look at CFLs future, it is EXTREMELY bright...
85W CFL link
Specs are as follows..
85-Watt, 5200 Lumens, 80 CRI
350-Watt Incandescent Equivalent
10,000 Hour Average Lamp Life
6500K Color Temperature, Daylight Color, Medium Base
$27.95
To get a LED light to get close to that brightness you would literally have to buy 520 of the BEST LED lights costing you at the min of $2600 :E ($5 per 100 lumens).
That 85W CFL rocks, I put one in my garage last summer, used it last winter and this summer and so far is still working.
They make even brighter CFLs to boot.
$4.80 for 280 lumens at 700 Mah. 910 lumens @ 3.0 Amps. multiply x 5 for 4550 lumens... $24.
Cree xm-l T6 LED's
โOct-27-2013 05:24 PM
(1)
LEDs, especially WHITE LEDs have a long, long way to get to CFLs price points, LONGEVITY and potential brightness.
(2)
To me LEDs have been unreliable and costly, heck I can't even keep SIMPLE LED taillights and even marker lights working reliably for more than a couple of years on my RV.
(3)
My experience with 120V home LEDs has also been terrible, the longest lasting 120V LED bulb made it TWO MONTHS and it cost $20 :M, the shortest has been one week..
(4)
You also can not get super uber bright LEDs, you know something that competes more on 40W and above in incadescent but yet you can find lots of super bright CFLs which are in excess of 350W of incadescent brightness.
(5)
Take a good look at CFLs future, it is EXTREMELY bright...
โOct-27-2013 04:45 PM
Gdetrailer wrote:ktmrfs wrote:
I have some LED recessed floods and they are bright, same color as halogens, dimmable, and very pleasing color rendition. (Costco had them). In fact, just for a comparison I left one 75W halogen in the kitchen and the other 9 floods were the LED. Walking into the room, it was very difficult to point out the one halogen. Brightness and color were very good.
Initially LED bulbs had 3 emitters, red, green, and blue with very narrow spectrum so no matter what, the color didn't appear very white. Some then added yellow to help but the same basic problem, 3 (or 4) very narrow spectral lines, not like "normal" light.
so, finally the solution. Use a phosphor coating like they do on floresent bulbs on the LED case surface. the LED excites the phosphor which then emits light at a variety of wavelengths, like a florescent bulb does. Now the spectrum is filling in and the output is much more like natural light. Couple that with varying the brightness of the 3 or 4 emitters and choosing phosphors and it is like floresents where you can make almost any color temperature you want pretty easily.
I suspect there is a very slight hit in efficiency, but more than made up for in the color of the light. And the CREE LED's seem to be continually improving in efficiency as well.
My prediction is that the LED's within one, maybe two years will be priced like the CFL's today and the CFL's will disappear quickly.
Not likely.
LEDs, especially WHITE LEDs have a long, long way to get to CFLs price points, LONGEVITY and potential brightness.
To me LEDs have been unreliable and costly, heck I can't even keep SIMPLE LED taillights and even marker lights working reliably for more than a couple of years on my RV.
My experience with 120V home LEDs has also been terrible, the longest lasting 120V LED bulb made it TWO MONTHS and it cost $20 :M, the shortest has been one week..
You also can not get super uber bright LEDs, you know something that competes more on 40W and above in incadescent but yet you can find lots of super bright CFLs which are in excess of 350W of incadescent brightness.
Take a good look at CFLs future, it is EXTREMELY bright...
85W CFL link
Specs are as follows..
85-Watt, 5200 Lumens, 80 CRI
350-Watt Incandescent Equivalent
10,000 Hour Average Lamp Life
6500K Color Temperature, Daylight Color, Medium Base
$27.95
To get a LED light to get close to that brightness you would literally have to buy 520 of the BEST LED lights costing you at the min of $2600 :E ($5 per 100 lumens).
That 85W CFL rocks, I put one in my garage last summer, used it last winter and this summer and so far is still working.
They make even brighter CFLs to boot.
โOct-27-2013 03:25 PM
ktmrfs wrote:
I have some LED recessed floods and they are bright, same color as halogens, dimmable, and very pleasing color rendition. (Costco had them). In fact, just for a comparison I left one 75W halogen in the kitchen and the other 9 floods were the LED. Walking into the room, it was very difficult to point out the one halogen. Brightness and color were very good.
Initially LED bulbs had 3 emitters, red, green, and blue with very narrow spectrum so no matter what, the color didn't appear very white. Some then added yellow to help but the same basic problem, 3 (or 4) very narrow spectral lines, not like "normal" light.
so, finally the solution. Use a phosphor coating like they do on floresent bulbs on the LED case surface. the LED excites the phosphor which then emits light at a variety of wavelengths, like a florescent bulb does. Now the spectrum is filling in and the output is much more like natural light. Couple that with varying the brightness of the 3 or 4 emitters and choosing phosphors and it is like floresents where you can make almost any color temperature you want pretty easily.
I suspect there is a very slight hit in efficiency, but more than made up for in the color of the light. And the CREE LED's seem to be continually improving in efficiency as well.
My prediction is that the LED's within one, maybe two years will be priced like the CFL's today and the CFL's will disappear quickly.
โOct-27-2013 02:46 PM
ktmrfs wrote:
I have some LED recessed floods and they are bright, same color as halogens, dimmable, and very pleasing color rendition. (Costco had them). In fact, just for a comparison I left one 75W halogen in the kitchen and the other 9 floods were the LED. Walking into the room, it was very difficult to point out the one halogen. Brightness and color were very good.
Initially LED bulbs had 3 emitters, red, green, and blue with very narrow spectrum so no matter what, the color didn't appear very white. Some then added yellow to help but the same basic problem, 3 (or 4) very narrow spectral lines, not like "normal" light.
so, finally the solution. Use a phosphor coating like they do on floresent bulbs on the LED case surface. the LED excites the phosphor which then emits light at a variety of wavelengths, like a florescent bulb does. Now the spectrum is filling in and the output is much more like natural light. Couple that with varying the brightness of the 3 or 4 emitters and choosing phosphors and it is like floresents where you can make almost any color temperature you want pretty easily.
I suspect there is a very slight hit in efficiency, but more than made up for in the color of the light. And the CREE LED's seem to be continually improving in efficiency as well.
My prediction is that the LED's within one, maybe two years will be priced like the CFL's today and the CFL's will disappear quickly.
โOct-25-2013 06:59 PM
โOct-25-2013 06:10 PM
โOct-25-2013 05:28 PM
โOct-25-2013 05:27 PM
โOct-25-2013 05:22 PM