Problem:
I know of melanopsin, a photo pigment in mammal eye that helps regulate circadian rhythms. It responds most strongly to blue spectrum light. There have been experiments that demonstrated that intensity of light is proportional to the impact on circadian rhythm regulation/ melatonin suppression.
This is why I'm interested if there is some optimal illumination intensity that has been demonstrated to result in better health/cognition in humans.
I heard anecdotal reports of full spectrum lighting improving attention in classrooms, but is there some chart or figure which says how much is "too much light".
If anyone knows about it then please provide some best results.