Most supermarkets here in Australia stock both warm-white and cool-white models of household fluorescent or LED bulbs, and people empirically seem to prefer warm-white in their homes. This doesn't seem to be the case with flashlights though, where even buying a 'neutral tint' or high-CRI flashlight on the internet seems to be a minority option- I don't know any major flashlight manufacturer that sells an LED flashlight in warm-white.
Lately I've been looking into the psychology of temperature colour, and I've found research linking blue light to melatonin suppression:
"How light affects our sleep"
http://www.marksdailyapple.com/how-light-affects-our-sleep/
"Blue light has a dark side"
http://www.health.harvard.edu/newsletters/Harvard_Health_Letter/2012/May/blue-light-has-a-dark-side
"How artificial light is wrecking your sleep, and what to do about it"
http://chriskresser.com/how-artificial-light-is-wrecking-your-sleep-and-what-to-do-about-it
"Drowning in light" (overuse of light in general)
http://nautil.us/issue/11/light/drowning-in-light
All Cree emitters seem to come in warm white and typically have higher CRI (albeit lower output), so why aren't more manufacturers releasing warm lights? I'd happily trade 20-30% lumen output for a more yellow light, and I can't be the only one.
The way I see it, humankind has been using yellowish light from fire, candles, lanterns and incandencent lights for thousands of years, cool-blue has only appeared in the past decade with LEDs.
Lately I've been looking into the psychology of temperature colour, and I've found research linking blue light to melatonin suppression:
"How light affects our sleep"
http://www.marksdailyapple.com/how-light-affects-our-sleep/
"Blue light has a dark side"
http://www.health.harvard.edu/newsletters/Harvard_Health_Letter/2012/May/blue-light-has-a-dark-side
"How artificial light is wrecking your sleep, and what to do about it"
http://chriskresser.com/how-artificial-light-is-wrecking-your-sleep-and-what-to-do-about-it
"Drowning in light" (overuse of light in general)
http://nautil.us/issue/11/light/drowning-in-light
All Cree emitters seem to come in warm white and typically have higher CRI (albeit lower output), so why aren't more manufacturers releasing warm lights? I'd happily trade 20-30% lumen output for a more yellow light, and I can't be the only one.
The way I see it, humankind has been using yellowish light from fire, candles, lanterns and incandencent lights for thousands of years, cool-blue has only appeared in the past decade with LEDs.