General > General Technical Chat
why do LED bulbs flicker now. They use to be stable
snarkysparky:
Can't seem to find any on the shelf that don't flicker.
how do they get out of manufacturing like this?
Seems like a case of let them eat cake.
BrianHG:
Please watch this: (he measures the flicker index, temp & CRI)
BrianHG:
Just in case you didn't get the message in the video, just buy the 'Philips Ultra Definition' bulb.
View the video in Youtube, and you will see his Amazon link to the Philips bulb in the video description.
Halcyon:
Most LED lamps have had some kind of flicker for as long as I can remember. Some visible, some not.
When I built my house about 8 years ago, I did research into bulbs with the least amount of flicker. ledbenchmark.com is a good resource I used at the time.
Maybe there is just a bigger range of cheaper/crappier bulbs out there now?
floobydust:
--- Quote from: BrianHG on March 10, 2024, 10:34:41 pm ---Just in case you didn't get the message in the video, just buy the 'Philips Ultra Definition' bulb.
View the video in Youtube, and you will see his Amazon link to the Philips bulb in the video description.
--- End quote ---
I stopped buying $8 LED bulbs a long time ago. The engineer in me thought they would meet their potential, but landfill is really where they all ended up. Even the Cree ones were dogs.
"Philips Ultra Definition" at Home Depot CAD $8 FFS too expensive. Ikea is $1 bulb on sale and they are lasting quite a long time.
Philips does make some shitty LED bulbs, lucky to get 2 years out of them and I took it apart and was appalled at how cheap it was.
They used to use several LED's and now it's just a single COB- which is terrible for half-angle, it's just a spot. It's too bad, they did have the best CRI I'd seen.
Why LED's bulbs blink blink blink?
I've found two reasons - the LED dies are glued onto the substrate and this does not take heat well. The heating and cooling cycle of the disconnect that happens makes an oscillator. It's the glue.
Second reason is the LED driver electrolytic capacitors dry out and the PSU just sits and blink blink blinks.
As I keep saying, the sea of patents and litigation prevent a manufacturer from making a really good LED bulb. A crime against humanity really.
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