Tint-free, High-CRI LED Light Bulb Discussion

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jwg223
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90ish? What’s a good high cri bulb from Amazon and…will it matter between 90 and say, 98 cri?

staticx57
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Joshk wrote:
jwg223 wrote:
I’m using the GE reveal hd+ led in my house…do these suck or something?

I’ve never got my hands on one, so idk. The reviews look fine. But they don’t tell their CRI rating, so that’s not a good start. Maybe BurningPlayd0h can give a psychic review.

I have the BR30 Reavel HD+ bulbs, they are of decent quality

Joshk
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Interesting, thanks. If you have the Duv reading, that would be interesting too.
That BR30 Reavel HD+ bulb looks remarkably like the Hyperikon A19: (Duv=-0.0009)

Here’s a Hyperikon BR30, but in 4000k because that’s all I have: (Duv=-0.0016)

SKV89
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I measured a half a dozen GE Reveal bulbs before and they usually have a DUV of -0.0035 or lower and R9 of at least 50. They have the best tint I’ve seen but they burn out the quickest. I’ve had so many died within days or weeks.

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Thanks SKV89, I know you have been on quite the search for LED strip. I was wondering what bulb you like these days?

As a side note, I switched the title of the thread to Discussion so we can all throw positive suggestions into the ring.

staticx57
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Joshk wrote:
Interesting, thanks. If you have the Duv reading, that would be interesting too.
That BR30 Reavel HD+ bulb looks remarkably like the Hyperikon A19: (Duv=-0.0009)

Here’s a Hyperikon BR30, but in 4000k because that’s all I have: (Duv=-0.0016)
!{width:20%}https://i.ibb.co/F3N44HT/HYPERIKON-BR30-01-4041-K-Color-Rendering.jpg!


Joshk
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Oof, way too tinted for my taste. But some people like maximum rosy tint.

BurningPlayd0h
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Joshk wrote:
sigh. Mass/weight has nothing to do with sustained heat dissipation. Surface area is all that matters once it’s up to operating temp. It seems to me they are transferring the heat out the metal threads to the metal and ceramic socket the bulb is threaded into. That adds needed surface area, and it is totally designed to take the heat.

Every E27/E14/etc. type bulb will do that, if it was sufficient for LEDs there would be no need for designing so much heatsinking into the units themselves as higher dollar units have. The fixture withstanding heat != offering heatsinking, heat is not the enemy for incandescent bulbs in the same way it is for LEDs.

Personally I don’t care if you have some imagined beef with this brand. But I do mind that every time I recommend them, you pop in to say I am recommending shit. You have repeatedly claim their are loads of reviewers that say they melt, yet when asked for proof, you are like, oh, they must have manipulated ALL the reviews. Geez. You have never owned one! I have been using them for years.

I have posted the link to the Amazon reviews, and made no such claim of every review being manipulated. Quite the opposite, the reviews and images on the page I linked speak for themselves. I don’t plan to hold my tongue on what I’ve seen because others are irritated by it, I want you to be able to offer a great product here and will share my genuine opinion about the resources you are using to create it unless the rules of BLF or statement by an admin otherwise prohibit that. I would do (and have done) the same for flashlight brands where I have seen or experienced failures, bad QC, whatever the issue may be.

staticx57
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Joshk wrote:
Oof, way too tinted for my taste. But some people like maximum rosy tint.

You know, in general I can see tint pretty well, but in this case it is actually quite pleasant. I believe it is due the fact that it is the dominant light source in the room by far. Kinda like how we do not see the sun’s tint.

There’s also the fact that there seems to be less perceivable tinting when it comes to lower temps, instead of green white purple it is yellow yellow orange.

jwg223
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I did the whole house in GE reveal HD+ and have lost 2 or 3 bulbs in as many years. No complaints about their life span from me.

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I did GE Reveal HD+ at my bedroom. Everything is great except it flickers sometimes for whatever reasons (it was in a rented apartment) so I switched back to incandescent.

If a LED emitter can die slowly, it can die quickly.

jp9mm
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Any recommendations for bulbs for taking pictures of canvas paintings?

lbwnb
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Sunlike for sure.

If a LED emitter can die slowly, it can die quickly.

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jp9mm wrote:
Any recommendations for bulbs for taking pictures of canvas paintings?

I would probably take the painting outdoors on a sunny day, face it mostly toward the sun, and put a white foam-board from the dollar store behind it to make photo editing easier. Then erase everything from the photo except the painting. Bingo, perfect lighting and an Amazon-like photo.

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Joshk wrote:
Thanks SKV89, I know you have been on quite the search for LED strip. I was wondering what bulb you like these days?

As a side note, I switched the title of the thread to Discussion so we can all throw positive suggestions into the ring.

The Reveal is still my favorite due to the low duv. Whites appear whiter. However the R9 could improve a bit and GE could really improve their reliability. From my experience, it is the most unreliable LED light bulb I’ve used.

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I knew you liked low duv, but I’m surprised you describe whites as whiter, instead of rosier. Using staticx57’s data for that bulb, the Reveal HD+ is further below the BBL line than anything I have ever seen on the consumer market.

SKV89
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That’s how GE advertises their Reveal line and I can confirm it is true. Negative DUV does make white appear whiter at warm CCT.

Reveal® HD+ filters out dulling yellow light to give you incredible color contrast and whiter whites for exceptional clarity

https://www.gelighting.com/led-hd-bulbs/reveal

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Interesting. Though their high R10 (yellow) reading seems to disagree with their marketing department’s explanation. But I trust you more, so if you can elaborate, I’m interested.

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Joshk wrote:
Interesting. Though their high R10 (yellow) reading seems to disagree with their marketing department’s explanation. But I trust you more, so if you can elaborate, I’m interested.

Give this presentation about light chromacity preference and color rendering preference. a read.

There is one paper cited about perceived white point specifically, and two about preference.

Also you seem to (?) conflate light chromacity and color rendering, a light that render yellows well doens’t mean it’s yellow tinted.

SKV89 wrote:
That’s how GE advertises their Reveal line and I can confirm it is true. Negative DUV does make white appear whiter at warm CCT.

Reveal® HD+ filters out dulling yellow light to give you incredible color contrast and whiter whites for exceptional clarity

https://www.gelighting.com/led-hd-bulbs/reveal

I didn’t know there were manufacturers that actually marketed ”less yellow” lightbulbs, this is great, do you know of other brands that also do this ? I’m afraid GE isn’t a thing in Europe.

SKV89
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Even before I had the GE Reveal bulbs, I noticed how much nicer white looks with negative DUV lights. I had a 1×2000k mixed w/ 3×3000k E21A -0.007 duv and I was surprised how un yellow it looked. Compared with other 3000k above the bbl lights, the E21A rendered colors much more natural and whites appear whiter. Since then, negative duv was a must for me when it comes to warm temps.

Here are some pics I found online on the GE reveal though it is exaggerated, it is kind of like the difference I see.

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Ha, those pics remind me of the horrible yellowish-tan our house was painted with when we bought it. We had the whole thing repainted to get rid of the yellow.

Interesting stuff. I’m going to make a low-duv bulb today and do some A-B testing later.

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Alright, I took my bathroom light and adjusted it with Green Delete. It was 2525k Duv -0.0004 and I had no complaints. I coated it until I reached 2525k Duv -0.0077 to match what we were talking about. There was no doubt it became way too rosy, and whites did not look whiter, they looked rosy. I left it like this for quite a while, and stayed in the bathroom with the door shut to see if my perception changed. My shock dulled, but it was still rosy.
Then I washed off most of the coating until I was at 2525k Duv -0.0020. I can still pickup on the rosy, but perhaps I can get onboard with the whites being more white on the countertop. The ceiling is white in the bathroom, and looking at the ceiling made it more obvious there was still a rosy tint. There is a chance -0.0010 could incorporate the best of both. I will test that next.

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Alright, for a while I walked back and forth between two bathrooms in my house with 2525k lighting. The “rosy” one has a Duv of -0.0010 and the “standard” one had a Duv of -0.0004. I do think white objects look a bit more pleasing in the rosy room, but I doubt I the difference was enough for me to pass an official A-B test. However when looking at the white ceiling, I could say with confidence which room I was in. The ceiling was rosy enough in the rosy room I believe I could pass an official A-B test, though probably not with a perfect score.
So in conclusion, a Duv of -0.0004 appears ideal for me.

Opinions will vary, science shows that.

After all the testing, I am left wondering if your walls are reflecting a color that contain extra yellow. Or if you happen to be a welder or have any other occupational explanation for your preference.

Joshk
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jp9mm wrote:
Any recommendations for bulbs for taking pictures of canvas paintings?

I just took this picture of a canvas for my wife. I walked outside with a foam-board backdrop, took the pic, and edited out the background. A sunny day would have been even better.

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Joshk wrote:
I just did a count, today’s dead bulb brings the total to 20. 20 bulbs x $20 each = $400 lost. I wanted to send them in and lay claim to that 20-year warranty they had, but the receipt paper has gone blank from 5 years worth of age as it always does. I’m probably screwed.

this is the main idea of products with 2+ years warranty Big Smile

BelMORDOR’s Ламповщик|Lampman
https://t.me/sunlikenews

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SunLike wrote:
Joshk wrote:
I just did a count, today’s dead bulb brings the total to 20. 20 bulbs x $20 each = $400 lost. I wanted to send them in and lay claim to that 20-year warranty they had, but the receipt paper has gone blank from 5 years worth of age as it always does. I’m probably screwed.

this is the main idea of products with 2+ years warranty Big Smile

You can always demand A4 paper printed invoice from a seller and the problem is solved Wink .

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