[elihu]

My heuristic is to just buy LEDs made by Phillips or GE, since invariably any generic or store-brand LED I've tried seems to lack rectification and/or filtering and stobes at 60 or 120 hz. I haven't tried any fancy/expensive "smart" programmable bulbs, but plain ones I do get seem pretty reasonably priced.

[namibj]

I've so far had good success with the ones Yuji sells; they are conceptually like buying a PC directly from Intel: Yuji makes LEDs (I'm not aware of them fabbing the semiconductor wafers in-house, nor synthesizing the phosphors in-house, but they develop them) that pride themselves in optical quality (using double and triple phosphor systems for CRI 95+ and CRI 98+, respectively) to justify their ~1$/W (electrical) price tag for strips of the lower grade (about double for the higher grade).

My main ceiling light is a now-discontinued remote phosphor 10W bulb, where the LED chip is covered by a loose plastic dome that is infused with the phosphor. The scattering gives a really wide and even light cone to partially illuminate the ceiling for extra diffusion. IIRC it was rated 20k hours probably due to the PSU, though I operate it uncontained for best (passive) cooling (and because I don't look at the socket it's hanging from anyways, lest I get an afterimage of the dome on my retina from staring at the lamp, so the non-fancy fixture doesn't bother me).

The PSU I got for some ultra-warn-white (iirc 1900K) strip (5m of 20W/m 24V PWM-able) from them (a knob on it does PWM dimming (iirc) just past the audible range)) was like 80 or 90 bucks, on top of the iirc ~110 bucks for the strip itself.

Given they don't seem to sell in normal retail stores, I'm not worried about brand inflation/"paying for the name", given their marketing is focused on spectrum measurements and color performance with the listed prices being "affordable" (1$/W @ 20ct/kWh means it costs as much to buy as the next 5000 hours of runtime will cost in electricity; I take "twice as much total operating cost than with literally free/gifted bulbs" as "affordable").

[Spooky23]

I have a 60w Phillips Endura LED bulb that has been continuously lit since about 2014. Quality parts last.

[Maursault]

Undoubtedly it is not producing the same color spectrum as new, as phosphors fade over time, its blue spike is getting wider and taller, so it is always producing more and more blue light, slowly permanently blinding you while disrupting your circadian rhythms, increasing your chances of having diabetes and heart disease, and taking years off your life. But at least you saved a buck.

[fsh]

Sunlight contains much more blue light than the output of any LED bulb. This scaremongering about blue content has no scientific backing at all.

[Maursault]

Only because the sun is much brighter than any LED, but when comparing the colors of the spectrum output, the sun's color spectrum is flat compared to LED, which has what is known as a "blue spike." Most of the light a high efficiency LED outputs is blue because all high efficiency LED are blue LED. Only phosphors allow it to output other colors. And the more the LED is used, the more the phosphors fade, the more the output spectrum shifts to blue. And there is more and more scientific backing showing the problems with LED becoming more concerning. Here is a summary of one scientific study.[1] There are myriad more, and more and more are being published.

[1] https://lightaware.org/2018/01/led-lighting-may-be-contribut...

[leobg]

It’s an aptly named product then. Quite rare these days.

[Spooky23]

IIRC, it was a product designed for a huge Federal RFP. So it was built to meet a meaningful standard.

The facilities guys at my former employer were very excited about it as they did an LED pilot previously that didnt go well.