I believe Lotus is not asking about the eyes most sensitive response to green, but what is "pure" green. I know the answer but let's see if you can find it.
^ Your body, your choice. But the damage it does is cumulative and lots of it will cause premature aging. Just ask long haul truckers.
Don't wreck your circadian rhythm. Some are on drugs like Ambien after working heavy duty night shifts. Take care.