Reset your body clock - from your bed! 

Daily Mail

Light is one of the keys to health and wellbeing because it sets our body clock. A new generation of lighting products claim to imitate the natural light cycle. https://www.dailymail.co.uk/femail/article-9181889/Reset-body-clock-bed.html?ns_mchannel=rss&ns_campaign=1490&ito=1490