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All LEDs are flicker free on dc power and they all flicker on ac power so what you’re looking for is an led bulb with a good quality internal dc power supply. Unfortunately many, even those advertised as flicker free, don’t meet this requirement, because they’re built cheaply.
This also depends to a degree on your eye sensitivity. My vision is poor but I can clearly see the difference between 30 and 60 fps whereas some of my friends and family don’t seem to notice such a thing. I don’t know if that’s similar but I’ve had experiences where I’m like “these lightbulbs are flickering” and other people are like “no they arent” and I then question if I’m potentially mentally ill or my eyes are possibly worsening even further (although thankfully sometimes other people notice too).
To oversimplify it it has to do with the rectification of the power supply and constant vs switching current dc power supplies
You can verify this by taking a high quality slow motion video of the bulb at least 240fps. I have some clips but they won’t upload.
Basically a hue white ambiance doesn’t flicker. This meets your requirements as it is adjustable between 2200k to 6500k. However, these are expensive and frankly I wish I never bought them because philips changed the terms of service after sale. I bought into their “ecosystem” years ago and I only run smarthome stuff on my local network but they are pressuring users to move to “philips security” which will require your lighting to be connected to their servers 24/7. This is apparently going to be necessary in a future update. A workaround is the bulbs do work with z wave but that requires additional hardware/software, plus why support a company that pulls such bullshit
A second video I have shows that as hue bulbs age they do begin to flicker though it is hard to see/perceive for some time. This is not a criticism of hue and more just something to be aware of with led lighting, the power supplies will begin to weaken and fail over time. Thankfully this takes quite some time, the bulb I have is approaching 8-9 years of life. But considering the price that’s not necessarily a great price per year (although keep in mind they’re regularly on sale). The flicker is mild
A third video shows a cheaper no name bulb that was marketed as flicker free. My partner says they are not bothered by it so it’s in their office but I can’t stand it. The video shows a much more dramatic flicker.
There is this website which verifies this for you, bulbs listed are either truly flicker free (category a) or imperceptible flicker (category b):
https://flickeralliance.org/collections/flicker-free-light-bulbs
This post is brought to you by autism
Beautiful comment, I love it.
Also: "pressuring users to move to “philips security” which will require your lighting to be connected to their servers 24/7."
Is the most unhinged boring techno dystopia shit I've read. It's a goddamn light bulb, kindly fuck right off with that shit.
The domestic appliances division has been sold to a chinese-controlled investment firm in 2021. Guess when this push started...