Question

I know of melanopsin, a photo pigment in mammal eye that helpsregulate circadian rhythms. It responds most strongly to bluespectrum light. There have been experiments that demonstrated thatintensity of light is proportional to the impact on circadianrhythm regulation/ melatonin suppression.

This is why I'm interested if there is some optimalillumination intensity that has been demonstrated to result inbetter health/cognition in humans. I heard anecdotalreports of full spectrum lighting improving attention inclassrooms, but is there some chart or figure which says how muchis "too much light".