Light exposure can be used to improve sleep-wake cycles, productivity, and alertness.

“I I say don't take a pill take a photo and not I mean you take pills it's important I'm just making it that really we have an opportunity right now with the incredible advances of LED lights of changing spectra of light of regulating intensities and just to assoc just for simple changes you could really improve sleepwake cycle productivity and still you could actually get more done because as we've talked about when you have all these messed up now you have to sleep more but your sleep is fragmented it's not very good”