Searching for reliable 4000K lightbulb that doesn't buzz.

Sounds good. Report back how you like them.

The bulbs finally arrived today. They seem to be 4K as they are yellower than a 5K bulb and not so yellow as a 3K bulb but they have a depressing feel about them. Hard to explain, but to compare, I have a 4K work light and the tint is just beautiful and pure.

What color are your walls?

All white walls.

Yea, they are terrible bulbs.

jk :innocent:
I went and did a Spectrometer test just now for you on a Hyperikon 2700k I bought on Amazon July17, this year. The results are below. It shows it exceeds the CRI promise at 93.4% and if anything it is a bit weak on the yellow area. The tint is almost sheer perfection too.

Haha, you got me there! Well, at least we know now they make good 2700K bulbs. Just for reference, my work light is 4000K and 5000 lumens and these Hyperikon lights are rated at 840 lumens each. I have six of them in the kitchen so 6 x 840 = 5040 lumens. The thing is, my 5000 lumen 4000k work light lights up the room to almost twice the brightness so something is off somewhere. I know I can't really do a direct comparison, but if I had to guess, these lights are about 500 lumens each max.

haha
But I see now should have measured a 4000k for you. Maybe I have some data on my PC about them…. brb

If you have anything that would be nice thanks. I'm wrong about 500 lumens for my guestimate as I switched one bulb with a 450 lumen 2700k bulb and the hyperikons are for sure brighter so just my eyes I guess. It's not going to be scientific but I'll wait for nightfall and see if everything changes and things all of a sudden look much better.

Our brains can tell us the light is wrong if it’s different than our memories, maybe you will adjust in a few days. idk

Very possible since the kitchen was lit up with the 5000K bulbs for so long that maybe we just don't get it yet. Still doesn't explain how beautiful the work light led is when comparing 4000K lights.

Found the data on my 4000k hyperikons
The CRI of 93.1% matches the advertised 93%. The yellow seems about right, but the green is a bit strong, causing a positive Duv (aka tint). Can I interest you in a can of Green Delete? :innocent:

I think you found the problem that we are seeing in that the green is overwhelming the purity of the light. Nothing like a detailed chart to confirm this thanks. Couldn't put into words what was off but it is the overbearing green that is doing it. Oh well, I'll keep searching for a decent 4K light and hopefully find it one of these days. BTW where do you find these charts?

My wife is using the 5 in the dining room right now with little else on in the house. The spectrometer confirms a tint in that room, but neither of us notice a tint at all. It must be that we are used to it.

Now that I know my dining room bulbs have room for improvement I’m going to paint them with Green Delete tomorrow. I’m looking forward to checking out the results tomorrow night after dark.

Have you looked at Waveform Lighting? These are pretty terrific bulbs. I use them all over my house and they are actually CRI 95+ according to my Sekonic C800 with kick ass R9

I never knew one could do something like that, I'd be interested in your feedback.

Very tempted to try them. This time I'll just buy one of them and see how they compare to the others, thanks! With shipping and our forever low Canadian dollar it's probably going to cost me $30 a piece, but I can live with that if they are really nice to the eye.

I think the 6 pack is quite a bit cheaper. Also, they have a no question asked return policy. If you do not like their stuff, they will even pay return shipping for the bulbs.

And it’s dark. That’s some good looking white light. I can’t say I feel it was tinted before, but it feels perfect now.