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The light from good quality LEDs should be indistinguishable from halogens, and better than any CFL. I've replaced my entire household with Philips 2700k LEDs of various types and they are excellent.

Poor quality LEDs are awful - the 50/60Hz flicker/strobe effect that many produce is very annoying and fatiguing and it doesn't surprise me that they're considered a health hazard.

Try quality LEDs and you won't regret them.




Nice, thanks for the tip. The "Choose your LED color" on the Philips site is pretty good for showing the difference between color temperature: http://www.usa.philips.com/c-m-li/led-lights/warm-led-light


2700K CCT means that the light from the diode is being mostly absorbed and re-emitted by the yellow phosphor. The lamps people have trouble with are those with a CCT of 4000+K, which emit several times more short-wavelength light for the same perceived brightness.

Incandescent lamps are typically ~2500K CCT


Try quality LEDs suggests that there are reputable manufacturers of LED products. Last time I tried Philips Greenpower, they said "40W!" yet the Kill-a-watt showed ~30w and it was nowhere near as bright as an 18w unit some cheapo Chinese maker had. General Electric markets a 7w UV LED - there's one 1W UV LED, and four 1.5W white LEDs, behind a fake woods glass. Yet neither the bulb nor packaging makes note of the white LEDs. It instead says directly on the bulb "395nm UV Light" as if that were all it emitted.

Quality certainly doesn't mean Brand-name in this day and age of unscrupulous law-buying companies.


watt is a poor measurement for measuering the quantity of visible light. Well I mean just knowing the lumina of a bulb doesn't help since it's a subjective measurement and can change depending on the kelvin of the light. For myself I usualy look for 600-800 lm and around 2600K well for the bath I go lower and only take a look at 400lm. As said measuring the light is extremly subjective for different kinds of people


"watt is a poor measurement for measuering the quantity of visible light"

Actually, it's a great measurement if you only work with the monochromatic ones. Knowing the LEDs efficiency at bin testing conditions will tell you what to expect - E.G. high-bin 3w 460n LED with 50% efficiency at 3w drive and typical operating temperatures (~70C junction temperature) means you can expect 1.5W of light. We toss in Avogadro's constant and a couple other formulas, do some multiplication, and suddenly we know roughly how many photons are being put out.

This gets harder with white LEDs as one must figure out the relative percentage of each wavelength comprising the light, basically forcing you to do the math a few hundred times over, but it's still rather reliable. I just do rough calculations in my head for White LEDs.


Not only that but about 5 years ago we replaced most of the house with Philips LED lights, most of them failed/are failing by now (they start by getting a darker patch in the bottom of one of the tubes and then it slowly spreads out and the light shuts off completely).

5 years for a product that is advertised as lasting for decades as this usage rate.


"they start by getting a darker patch in the bottom of one of the tubes"

Tubes? Presumably you're talking about CFLs, not LEDs? 5 years ago, household LED lamps were still in their infancy and were really expensive.

My experience with CFLs was pretty similar to yours. They didn't last, and dimmable ones especially would often fail within months. And the quality of light from fluorescents was never all that good anyway.

But out of around 25 Philips LEDs I've installed, most of them dimmables, not a single one has failed or had any problems so far. The oldest ones were installed around a year ago now.


The Philips A19-style bulbs kinda look like futuristic tube-ish light bulbs. It's just a circular ring of LEDs inside. One section goes out, then the next, in a cascading failure.


And yet, here I hold some cheap (literally $0.99 each) 9w Chinese LED bulbs, several of which have been operating 24/7 for a couple of years, and still working just fine.

So much of a crapshoot.




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