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

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

Have any decent, budget friendly 4000K light bulbs come on the market yet that are fairly priced, reliable and don't buzz?

Edited by: klrman on 08/27/2020 - 00:33
rngwn
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You can refer to this, at lease for the light quality perspective. http://budgetlightforum.com/node/69805

I think you might need to specify the shape and socket so people can better help you.

 

Searching for High CRI leds since 2010...

 

Has finally gotten to the bottom after 10 years of delving deep into that rabbit hole of them high CRI lights...

 

High CRI, high quality lights doesn't need to be expensive, or is it?

 

klrman
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Thanks.  Had a look at that thread but didn't want to go through the whole 14 pages at the moment.  E26 socket with standard light bulb.  Have many led ones from walmart in 3000k and 5000k.  3000k ones are not too bad but still too yellow and the 5000k ones have a  horrible greenish tint.

Joshk
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I have these Hyperikon, they are great.
4000k, 93 CRI, and no buzz, dimmable, instant on, good price.
https://smile.amazon.com/Hyperikon-Bombilla-regulable-Energy-unidades/dp...

klrman
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Thanks Joshk, I was looking at those yesterday as the 4000K ones weren't on the amazon Canada site.  Is the 4000K tint pretty good?  Just don't want the harder bluish or greener tints of the 5000k up.

Joshk
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I’ve got the 2700, 3000, 4000, and 5000. My favorite is the 2700 simply because I have a mix of LED, halogen, and incandescent in my house, and the 2700 is the match for the rest. The other 3 temps look odd when they are turned on at the same time as halogen/incandescent just because they are different.
During the day the 2700 color is mixed with sunlight through the windows anyway, resulting in an effective color closer to 4000k.

klrman
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Looks like you have a lot of lights in your house!  Halogen is still my favourite but my wife wants the 4000k for the kitchen so I just ordered the ones you suggested from your link and see how she likes it, thanks.

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Sounds good. Report back how you like them.

klrman
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Will do, looking forward to them.  Never thought I would find a reasonably  priced 4000k bulb, so this is quite a bonus even though I end up paying double the price ordering through the US, it still works out to be a great deal for us.

klrman
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The bulbs finally arrived today.  Have to admit that I wouldn't order them again.  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.  These seem to put out a very dirty 4K is the only way I could explain it and they are very hard on the eyes when in the room.  I don't notice any flickering but maybe they pulsate or something like that enough to be really annoying to the eyes.  I didn't say anything to my wife as it was for her kitchen so I just put them on and if she says nothing then all is good, but she knew right away when she turned them on and really hated them. They are not nearly as bright as the advertised lumens either but it was worth trying them out for the price. 

Joshk
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What color are your walls?

klrman
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All white walls. 

Joshk
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Yea, they are terrible bulbs.

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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.

Quote:
Date Saved,9/14/2020 5:21:04 PM
Title,HYPER2700_01_2605K

Measuring Mode,Ambient
Color Space / White Point,HSI,D65
CCT [K],2605
⊿uv,0.0005
Illuminance [lx],342
Illuminance [fc],31.8
Reference CCT [K],2700
LB Index [MK⁻¹],-14
LB Camera Filter,82A
LB Lighting Filter,R3216 1/8 CTB
CC Index,0.0
CC#,0.0
CC Camera Filter,CC025M
CC Lighting Filter,——-
CRI Ra,93.4
CRI R1,93.8
CRI R2,98.0
CRI R3,98.8
CRI R4,92.2
CRI R5,93.4
CRI R6,97.6
CRI R7,91.1
CRI R8,82.0
CRI R9,62.5
CRI R10,94.2
CRI R11,93.3
CRI R12,83.5
CRI R13,95.1
CRI R14,99.5
CRI R15,89.7
TM-30-18 Rf,90
TM-30-18 Rg,96
SSIt,80
SSId,44
SSI1,—-
SSI2,—-
TLCI,93
TLMF,—-
CIE1931 x,0.4688
CIE1931 y,0.4139
Hue,32deg
Saturation,90%

klrman
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Joshk wrote:
Yea, they are terrible bulbs.

 

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. 

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

klrman
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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.

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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

klrman
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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.

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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

Quote:
Date Saved,9/19/2019 2:05:19 PM
Title,HYPERIKON_07_3954K

Measuring Mode,Ambient
Color Space / White Point,HSI,D65
CCT [K],3954
⊿uv,0.0020
Illuminance [lx],1730
Illuminance [fc],161
Reference CCT [K],5500
LB Index [MK⁻¹],-71
LB Camera Filter,80D, 82A
LB Lighting Filter,R3208 1/4 CTB, R3208 1/4 CTB
CC Index,0.3M
CC#,0.9M
CC Camera Filter,——-
CC Lighting Filter,——-
CRI Ra,93.1
CRI R1,93.3
CRI R2,94.6
CRI R3,94.3
CRI R4,93.4
CRI R5,91.9
CRI R6,91.5
CRI R7,96.4
CRI R8,89.2
CRI R9,70.8
CRI R10,85.9
CRI R11,92.8
CRI R12,71.0
CRI R13,93.6
CRI R14,96.3
CRI R15,91.3
TM-30-18 Rf,91
TM-30-18 Rg,99
SSIt,73
SSId,68
SSI1,—-
SSI2,—-
TLCI,95
TLMF,—-
CIE1931 x,0.3840
CIE1931 y,0.3833
Hue,40deg
Saturation,50%

klrman
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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?

Joshk
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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.

klrman
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maybe she'll get used to it in a week or so too.  If not I can always go back to the 5k bulbs for now.  I think we were expecting too much and have to accept that when the bulbs have the frosty plastic globe on them they're all going to look somewhat off no matter what the tint is. 

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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.

shutterboy
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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

https://store.waveformlighting.com/collections/a19-bulbs/products/centri...

klrman
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Joshk wrote:
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.

 

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

klrman
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shutterboy wrote:
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

https://store.waveformlighting.com/collections/a19-bulbs/products/centric-daylight-full-spectrum-flicker-free-a19-10w-led-bulb   [/quote]

 

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.

shutterboy
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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.

klrman
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The excitement didn't last long for me lol.  $53.48 US for one bulb including shipping to Canada.    They don't even allow for USPS shipping to Canada, only DHL and nothing else.

Joshk
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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.

klrman
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So how did you do it?   If I can reduce the green then it would be just perfect.

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