****Interesting? Please read full post, I answered my own question******
Dave Asprey on mitochondria and light environment:
fitfluential.com/2016/12/circadian-wellness-health-how-to-biohack-your-mitochondria-via-light-nutrition-and-lifestyle-choices-with-dave-asprey-part-1/This light color part is about
1/2 to 3/4 into the 25 min talk above. DS says only use incandescent (they will be obsolete per US energy use law), or halogen, or red florescent. I'm thinking his talk here is a little dated, as he does not mention Kelvin rating. Kelvin range options for LED's were rare a few years ago. Watt or watt similarity has nothing to do with color warmth-heat spectrum, thus no effect on sleep.
Those florescent and LED bulbs in your house with a mid or high kelvin rating (daylight or cool color), and the bright blue car lights in your eyes are bad for your sleep. And if it says "daylight", is that the same as full spectrum? Successful marketing fools everyone with word games. At this point, the higher the Kelvin rating 3500- 5500, the closer it is so sunlight/daylight and might not be good to use at night. The lower Kelvin ratings 2500-3500 used at night will still allow your body to make melatonin.
**All this led me to wonder about
these seasonal SAD light boxes - I cant find what specific bulbs they use, I e-mailed one place to find out (waiting).**
People living south of a line from LA to Atlanta, (anywhere closer to the equator) prob have enough light even in winter, its less hours but more direct in the sky than up north. Up north in Dec, Nov, Jan, winter, if the sun is out, its way low on the horizon, very far away. Alaskans, your screwed, no sun one month?!
More on the color spectrum (but its old site here): [url]http://www.sean-crist.com/personal/pages/sad/[url]
Post Edited (astroman) : 12/27/2016 9:19:05 AM (GMT-7)