Thread: Walmart and Rakuten Announce New Strategic Alliance
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Old 02-12-2018, 09:27 PM   #222
j.p.s
Grand Sorcerer
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It was honest confusion, and color can be confusing.

Besides, there is overlap in cones response to light of various colors. But it turns out that red and green have a lot of overlap, not green and blue.

Anyway, I just did a search on green light interfering with sleep, and it turns out that green light was the control for the original Harvard study. So, even if green light interferes with sleep, it is much less than blue light.

https://www.health.harvard.edu/stayi...as-a-dark-side

So, a green lit reader would reduce sleep interference compared with the typical white lit reader. Not saying people would like a green lit reader or that anyone should make one for sale.
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