Which colour of LED bulbs is preferred?

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Gary Vicker
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Which colour of LED bulbs is preferred?
Warm white
33% (21 votes)
Cool white
5% (3 votes)
Neutral white
63% (40 votes)
Total votes: 64
Edited by: Gary Vicker on 10/05/2018 - 06:52
raccoon city
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I prefer warm white.

You might want to include a choice for neutral white.

Skylight
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I would choose neutral white with 4000 – 4500K. If there is only a choice between warm and cold white I always go for warm white. Cold white makes colors look ugly blueish.

2100
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Neutral white. 4000K or 5000K is fine, not anal.

Jack Kellar
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Again, I can’t vote. When I click “vote” it goes to an entirely different thread and worse, it doesn’t register the vote. So, putting it on words instead. Word to the wise: vote on the OP, not the sidebar. Then it’ll register no problem.

Although I enjoy all kinds of LED lights (even cool white, it’s neat for a change every now and then to contrast with the horrible dim and low-CRI yellow light of sodium streetlamps), warm white is my favorite. I’ve only got one WW torch (Convoy M1, 7A tint) thus far, and I really enjoy the “incandescent” look of the beam, especially indoors. I plan on getting my first S2+ in 7A as well, and then an M2 in 3B neutral white.

raccoon city
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@Jack Kellar:

Did you try to vote in the OP of this thread?

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I voted warm white, but would prefer color temps of 4000-4500k.

So creamy and smooth.

Jack Kellar
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raccoon city wrote:

@Jack Kellar:


Did you try to vote in the OP of this thread?


Nope, tried on the sidebar. Now I tried in the OP, and it worked.

This site is odd sometimes o_O

Jerommel
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Assuming this is about indoor / home lighting bulbs, definitely warm white.
I remember when halogen lamps became the norm, and although they’re cooler than old fashioned incandescent bulbs, halogen bulbs are still warm white, like 2700 – 3000 K.
For me that’s the preferred colour temperature for indoor / home lighting.
But the CRI is important too. 80 CRI can be acceptable, but higher CRI and with the natural amount of red in it is much better.
Afteral, incandescent bulbs are 100 CRI.

Streamer
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WW here

ToyKeeper
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FWIW, here were the results from the last time we did a color temperature poll.

Cool white (6500K) and warm white (3000K) were the two least-preferred options.

Also, to people who voted early in this new poll, a neutral white option has been added in case you want to update your preference.

DavidEF
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OK, who’s the NOOB that chose cool white?! Silly

Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone.
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raccoon city
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I think there's a fair amount of BLF members that prefer cool white for throwers...

But that doesn't describe me.  :-)

Jack Kellar
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DavidEF wrote:
OK, who’s the NOOB that chose cool white?! Silly

My guess is the noob that is sick of humans only having warm white for millenia for illumination, and is fully on board with the “hi tech” aspect of hospital bleach lighting Big Smile

That or he misclicked Silly

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Jack Kellar wrote:
DavidEF wrote:
OK, who’s the NOOB that chose cool white?! Silly

My guess is the noob that is sick of humans only having warm white for millenia for illumination, and is fully on board with the “hi tech” aspect of hospital bleach lighting Big Smile

That or he misclicked Silly

Big SmileThumbs Up

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Streamer
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When OP asked which color of LED “bulbs” was preferred, I immediately assumed by “bulbs” he meant “bulbs” around the home. That said, my response to flashlight tint/color would have been different.

phantom23
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For the house I prefer warm white ones. They make the least amount of blue light. But there’s one even more important factor – real world color rendition. A while ago I bought some discounted Philips bulbs and some similarily priced (cheap, store branded) bulbs from the local construction store. Both 100W equivalent (1521lm), warm white, declared 80 CRI. Night and day. Cheap ones make all colors look very pale and dead, Pilips bulbs – the other way around, with nice soft light and juicy colors.

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DavidEF wrote:
OK, who's the NOOB that chose cool white?! Silly

 

zak.wilson
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raccoon city wrote:
I think there’s a fair amount of BLF members that prefer cool white for throwers…

I find this odd since CW tends to produce much more visible backscatter, obscuring the view of whatever is being illuminated. I actually like my throwers warmer than my general-use lights. I suppose CW is better for playing lightsaber in the fog.

It’s not rare that I set my Viltrox panel is cool as it goes, but it’s 95 CRI and very close to the blackbody line. I’m less picky about color temperature when the other characteristics of the light are nice.

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Jack Kellar
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Hi CRI cool white must be something else. I’d love to see it.

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There's something you may need to bear in mind when going higher kelvin temperatures: the cooler the temperature, the higher the luminous pressure required for a pleasing visual experience. Check the Kruithof curve:

 

 

In normal daylight conditions the lux/m² proportion usually is a lot higher than what you usually get at home, let alone with a flashlight at a distance.

In essence, the cool white led fashion was probably due to involved people knowing no better.

We know have great high CRI cool white leds from Nichia, Samsung, Cree and Yuji to some extent. It may require some DIY effort from yourselves in modifying your home lighting setups, or look for specific high CRI cool white products.

 

Cheers Party

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.
Thanks for posting Barkuti, very interesting. . . Thumbs Up

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2100
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Ok, if it’s for home bulbs then it’s WW. But prefer 3000K WW than 2700K WW. 80 CRI is fine, not anal.

Flashlights, it’d be NW, 4k or 5k is fine. I still have like 4 or 5 warm white LEDs, for that fun look trying to be like an incandescent flashlight. My brightest one is the nostalgic “DRY” 3 x XM-L budgetlight that some of ya would remember, it has a direct drive driver. ie it can pull the right amount of amps from the NCR18650A, approx 3.5-4 amps, esp useful if you are in a cold climate.

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It would have been nice for Gary Vicker to define the temperature ranges for cool, neutral and warm white. As it is I find this a tad imprecise, For example: warm white for up to ≈3400K, neutral white from ≈3400K to ≈5000K, cool white from above ≈5000K or so.

Don't you think?

 

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DavidEF
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Barkuti wrote:

It would have been nice for Gary Vicker to define the temperature ranges for cool, neutral and warm white. As it is I find this a tad imprecise, For example: warm white for up to ≈3400K, neutral white from ≈3400K to ≈5000K, cool white from above ≈5000K or so.


Don’t you think?


 


Cheers Party 


I’d say that’s a good set of parameters, at least for how I’d use those monikers.

Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone.
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teacher
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Barkuti wrote:

It would have been nice for Gary Vicker to define the temperature ranges for cool, neutral and warm white. As it is I find this a tad imprecise, For example: warm white for up to ≈3400K, neutral white from ≈3400K to ≈5000K, cool white from above ≈5000K or so.

Don’t you think?

Cheers Party

The poll is OK.

But I think the whole CCT thing ( WW, NW, CW) needs to be redefined from the ground up. What’ K’ really constitutes WW, NW, & CW? What is really NEUTRAL WHITE & adds little or no tint….. warm or cool?

For example, there is exactly nothing “Neutral White” about a 4000K tint…. much less a 3400K. It is Warm White.

And there is nothing Cool White about 5000K. It is NEUTRAL WHITE…. simple as that.

For flashlights give me 5000K – 5700K. That is pretty much ‘TRUE NEUTRAL WHITE’. No rosy red tint added and no harsh blue added either.

YMMV….. mine does not. . . Wink

The comments above are in relation to ‘emitters’ used in flashlights. The majority of people use flashlights mostly outdoors. These comments are adressing that.

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zak.wilson
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I’ve seen 4000K labeled “cool white” on a screw-in bulb, “warm white” from Armytek and a few small makers, and most often “neutral white”. These are marketing terms that don’t have fixed definitions.

A poll like this was conducted last year with actual color temperatures and 5000K won with strong showings from 4500K and 4000K. The plurality voting method used there is suboptimal with more than two options though. The poll for the FW3A color temperature using a ranked Condorcet method produced a similar result with 5000K on top, 4000K-5000K being popular and options far form that range being unpopular.

Polls have also been conducted on reddit and CPF using approval voting with the popularity peak covering the same range. (4000K won overall on reddit; 4500K on CPF)

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Hmm.. I would describe 5000 – 5700K as ‘pure white’ rather than neutral, but i suppose it depends on what is neutral to you or me.
But neutral sort of implies it is pure, so that’s confusing too… Facepalm
I think 5000K is cloudy sky white, which is usually far from warm, a bit cool rather.
I’m not sure actually..
But we can agree that 6500K is cool white, although it, when you have a high CRI LED on the BBL (not greenish, not pinkish), looks quite pure too…
And then we have differences between LEDs of the same colour temperatures…
The Luxeon V 4000K looks warmer / more yellow than the Samsung LH351D 4000K.
As for Nichia, the 219C 4000K is a bit on the cool side, unless you buy it from Kaidomain…
So i don’t know.
But my own experience is that 4000K is neutral, when i use it as a work light in a head lamp.
But that’s usually in the evening, when every ‘normal’ light source is around 3000K.

Maybe we should try to determine it using spectrograms of LEDs.
Cool white is a down slope from blue to red, whereas warm white is an up slope from blue to red.
I guess neutral would be a flat spectrogram, but you always have that blue spike and the valley of cyan, and with low CRI low R90 LEDs that droop towards deep red..

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Wink . /\ . . Thumbs Up .. . “Pure” & Neutral are the same to me.

Besides that, as you aptly illustrated Jerommel; there is a lot to consider. Big Smile . Smile . Facepalm . . Thumbs Up

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Jerommel wrote:
Hmm.. I would describe 5000 – 5700K as ‘pure white’ rather than neutral, but i suppose it depends on what is neutral to you or me.
But neutral sort of implies it is pure, so that’s confusing too… Facepalm
I think 5000K is cloudy sky white, which is usually far from warm, a bit cool rather.
I’m not sure actually..
But we can agree that 6500K is cool white, although it, when you have a high CRI LED on the BBL (not greenish, not pinkish), looks quite pure too…
And then we have differences between LEDs of the same colour temperatures…
The Luxeon V 4000K looks warmer / more yellow than the Samsung LH351D 4000K.
As for Nichia, the 219C 4000K is a bit on the cool side, unless you buy it from Kaidomain…
So i don’t know.
But my own experience is that 4000K is neutral, when i use it as a work light in a head lamp.
But that’s usually in the evening, when every ‘normal’ light source is around 3000K.

Maybe we should try to determine it using spectrograms of LEDs.
Cool white is a down slope from blue to red, whereas warm white is an up slope from blue to red.
I guess neutral would be a flat spectrogram, but you always have that blue spike and the valley of cyan, and with low CRI low R90 LEDs that droop towards deep red..


But… Who’s on first? Facepalm

Reason is not automatic. Those who deny it cannot be conquered by it. Do not count on them. Leave them alone.
-Ayn Rand