If you want you house lights to do the same thing, get some Philips Hue bulbs and this app I wrote: https://itunes.apple.com/ca/app/circadian-hue-for-philips-hu

If you want you house lights to do the same thing, get some Philips Hue bulbs and this app I wrote: https://itunes.apple.com/ca/app/circadian-hue-for-philips-hue/id1165687051?mt=12&ign-mpt=uo%3D4 https://itunes.apple.com/ca/app/circadian-hue-for-philips-hu... My old office didn't get much external light, so I wrote this app to give me a sense of time of day. Now I have a better office I still use it.