If using the type with heat sink would do a better job....in comparable of THIS! This was exactly what I saw was going on from my Columbia mall...but they did some action due to this issue by using special type of CFL which actually looked good (they had to change the wiring but using same fixtures)
Philips had a BRILIANT idea by using remote-phosphored blue LEDs! In my opinion white LEDs won't be the technology used in the future. Single-coloured LEDs (without any phosphors) are more efficient and don't suffer lumen loss as much over time.
I was told by lighting professionals that CFLs will likely win out as the long term solution, due to the high cost and physical limitations of omnidirectional LEDs. Halogen IR lamps also hold potiential for the long term. TCP is supposedly coming out with a new Halogen IR lamp that uses HALF the wattage of the old INCs.
This is not to say LEDs don't have a future, they are best in optical applications where they are the most efficient with very little loss of light. Examples include track lighting, street lighting, etc.
I actually *kinda* prefer to see CFLs than LEDs, because CFLs are way more fun to mess with than LEDs (taking them apart and repair them, messing with burnt out CFL tubes, etc.).
That being said, I'm gonna avoid using CFLs in any fixture that isn't both or either open or horizontal/base down anyway, prefering halogens for enclosed and base-up fixtures.
The LED lamps with the many 5mm LEDs, tends to fail, earlier then the ones with the several HPLEDs, because most of them are from unknown brands or poor brands from China.
Also, i think that in these low cost LED lamps, are LED drivers that are nothing more then a series capacitor and bridge rectifier, and if the lamps aren't flickers, then also filtering capacitor for mains frequency filtering.
Vince: The lumen loss over life that you see in white LEDs, is in fact related usually to the diodes themselves, and this can happen with single color LEDs as well.
Phosphor fading in white LEDs, expressed as a major color shifting toward high kelvin bluish white color and then blue, in addition to lumen loss.
I have a cheap LED torch that has one failing die, which starts of by flickering slowly, getting faster and dimmer as it warms up then eventually just glowing very faintly. I will replace it with another, and think the faulty die had a slightly lower Vf and a lower slope resistance that caused it to be a current hog, as the 3 dice are in parallel in this torch, driven by a boost converter in a SO 3 pin package. I will add a bypass capacitor to the input when fixing it, whatever scrap SMD tantalum I can get with around 10-33 uF and a 6V rating that will fit there. It helps a lot as the battery ages, especially in remotes, as the battery ESR can get very high before the unit stops operating, you can use a battery that will no longer run a clock and still get some work out of it.
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This is not to say LEDs don't have a future, they are best in optical applications where they are the most efficient with very little loss of light. Examples include track lighting, street lighting, etc.
That being said, I'm gonna avoid using CFLs in any fixture that isn't both or either open or horizontal/base down anyway, prefering halogens for enclosed and base-up fixtures.
Also, i think that in these low cost LED lamps, are LED drivers that are nothing more then a series capacitor and bridge rectifier, and if the lamps aren't flickers, then also filtering capacitor for mains frequency filtering.
Vince: The lumen loss over life that you see in white LEDs, is in fact related usually to the diodes themselves, and this can happen with single color LEDs as well.
Phosphor fading in white LEDs, expressed as a major color shifting toward high kelvin bluish white color and then blue, in addition to lumen loss.