There's something off about LED bulbs

Post by sparker72678 » Thu, Mar 30, 2023, 5:26 PM UTC

Majromax wrote: post #407

sparker72678 wrote: post #223

Earlier quoted context omitted.

Agreed the e-waste issues are real, but how did you get incandescents to last 10 years? I replaced every dang one after 12 months or less, every time.

> how did you get incandescents to last 10 years? As a general answer, dimming. Incandescent bulbs are fantastically sensitive to applied voltage; Wikipedia's article on the subject ( https://en.wikipedia.org/wiki/Lamp_rerating ) notes that bulb lifespan is inversely proportional to the applied voltage to the fourteenth power or so. In an ordinary home you can't directly reduce the supply voltage, but dimming a highe…

Post by xxpor » Thu, Mar 30, 2023, 5:29 PM UTC

katbyte wrote: post #498

kitsunesoba wrote: post #295

Earlier quoted context omitted.

Similarly, I started buying Philips Hue bulbs back around 2015 and none of those have failed in the time since, even being used every night since then. They're all in freestanding floor lamps installed in a horizontal orientation, which might have something to do with it. That seems like it'd dissipate heat a lot better than e.g. a pot light housing in the ceiling.

+1 for hue colour/white adjustable ones They produce great light at the temperature you want and I’ve yet to have one fail after nearly 10 years using them. Not cheap, but given I’ve never had to replace one maybe in the end they are

Post by uranium » Thu, Mar 30, 2023, 5:33 PM UTC

Post by xxs » Thu, Mar 30, 2023, 5:35 PM UTC

jasonlaramburu wrote: post #502

chongli wrote: post #465

Earlier quoted context omitted.

The big problem for me is, as a consumer, how do I know that brand X is producing quality bulbs that'll last a long time? The issue is that LED bulbs aren’t simple devices like incandescent bulbs. LED bulbs have an electronic power supply inside which drives the LEDs at a constant current. Power supply design is a major subfield of electronics engineering and there are all kinds of tradeoffs you can make to optimize…

>It is possible (and not very difficult) to design LED bulbs that will practically outlive their owners It is also possible (and not very difficult) to design incandescent bulbs that will outlive their owners. In fact, the first mass produced light bulbs generally lasted 2,500+ hours. In the 1920s, the major bulb manufacturers formed the 'Pheobus Cartel' in Geneva and secretly colluded to limit the lifespan of bulbs…

Post by unyttigfjelltol » Thu, Mar 30, 2023, 5:37 PM UTC

PragmaticPulp wrote: post #228

tomatotomato37 wrote: post #150

I hate how many of these things aren't limits of the technology but rather the result of cost optimization and general apathy towards the customer. We know how to mass-produce quality LEDs to the point entire TVs are made of the things. We know how to mass-produce rectifiers pretty much ever since diodes existed. We know how to cool mass-produced objects in compact spaces. But because we apparently can't have nice th…

You can go buy high CRI, high quality bulbs right now. Nothing is stopping you. Here is one common vendor: https://store.waveformlighting.com/collections/a19-bulbs/ The issue isn’t that MBAs have cost reduced bulbs for no reason. The issue is that 95% of consumers will only choose the cheap bulbs, period. As a result, that’s what gets produced at scale. > We know how to mass-produce quality LEDs to the point entire T…