I assume both are white lights. Which is brighter warm or cool?
2075396
the cool white light seems 'brighter' to our brains, because it is most like the 'light' we experience when outside at midday with clear skys. Going up the kelvin scale the light gets a greater 'blue tint'. Going down the kelvin scale the light becomes increasingly more yellow/orange (simulating dusk-like light). I have difficulty going to sleep, so I try to match my lighting to be equivalent to outside conditions (using 5000K in the morning/daytime, and using 3500K and less in the evenings). There is research to support changing light temp to improve sleep patterns (see: justgetflux.com)
2075397
It's not a matter of brightness. Both emit the same # of lumens. It's a function of the light spectrum they emit. So it's really an aesthetics question. Some people don't care for "white" that's in the 5,000K range and prefer the "warm" or yellowish light emitted at 3500K.
2075398
You are correct they are white white lights nice and bright, cool white is thew very white light, warm white is the yellow light
1272791
It appears to be white and of course the "color" is clear. I've been wondering about cool as opposed to warm in fluorescent lights and haven't been able to find the long 48" in warm, so have some of each. It has all become too, too complicated and I wish we could go back about 20 years. (My late father in law, said,"Don't get old." And he was right.)Hope this helps.
1761436
Warm white is much better in the outdoors. As landscape lighting designer and installer I can tell you you will not be happy with the harsh effect a white light will give you outdoors.
1048600
I would call it warm white. They are not real bright as they only have two LED's in them but that is what I was looking for. I did not want harsh lights
2241894
Cool is generally bluish, warm is yellowish. This light is a white, medium warm light. Very pleasant on the eyes in the middle of the night. As noted in another answer, it is easy to adjust brightness to your own preferences. Also, the auto on/off lags by about 15-30 seconds - not a problem, just noticeable.
290178
My wife said cool white and I must agree . I am looking and trying other bulbs but have not had any luck with color.
1454501
No, these are is listed at 6,000k which puts them at the high end of "daylight". It is really "white". Warm white refers to a color temperature around 3,500k.
1321380
Warm. It's slightly cooler than incandescent. Exactly the same as halogen. The color remains the same when dimmed, unlike incandescent which gets warmer.
1978573
They are about the same brightness, but I think they are a more white color of light. The original lights seemed to have a slight yellow tint. I like the color better, the best thing is that they stay cool to the touch and draw much less power.
133864
The kelvin rating, cool is around 6500k which is closer to a white light, giving illumination that maintains a trueness of colour. Warm has an orange/red tint.
360640
Gosh, I don't know, "warm white", that's hard to say. It's a fluorescent light, I wouldn't expect,"warm white" from any fluorescent light. It was purchased to add light to an area, it doesn't make the character of the wood on my desk look better, that's for sure. It's not a "warm" light, it's just a light where needed. I will say its a tight fit. I don't know if that is because of my fixture or the length of the lamp. Also, the first one arrived broken because of poor packaging. It was promptly replaced,but...still.
1318226
the first one I ordered was cool white, and thought that I ordered another one just like it but it was warm white and there is a difference the one is a bright white and the other is more of a yellowish white, the first one puts out more light and is great
1618395
That is a bit of a relative question... I will muddle the situation by saying it is in between. It is not a white/blue light (what I suspect you call cool) nor is it a soft, yellow light (what you probably call warm). I have multiples of these installed in my home. By playing with the level of brightness, I am happy with every one of them.
589852
I find the lights to be a bit cooler (bluish) than the halogens that were originally on my camper. The impression is a whiter light as opposed to the yellowish light of the old lamps.
737543
AS noted below, the White in the RGB (Red, Green, Blue) isn't a true white. However, Amazon offers OLS kits in Bright White and Warm White. Amazon's number for the Bright White is B002CQ0GYA. Warm White is B004ZO3BSK. My eyes aren't very good, so I need A LOT of light. They are pretty bright and the bright white and warm white have similar features such as 8 dim / bright settings. Plus On / Off. The warm white is around 3000 to 3500K temp. Bright white is 6000K to 7000k. Hope that helps.
402468
Cool white is the blue looking light and warm white is the little yellow looking light
701735
Mine are pure, clean and bright white with no trace of blue...but I would not call the light 'warm.'