This article published in The Telegraph describes research showing how light, especial blue light, can disrupt our circadian rhythms. Insomnia is common in ADHD, depression, and anxiety and this article reinforces why shutting down our electronics well before we go to bed is so important to getting to sleep.http://www.telegraph.co.uk/science/science-news/10073379/Electric-lighting-prevents-proper-nights-sleep.html