Hi all, I came across this on National Radio over the weekend. There is a linux version too. f.lux is a bit of software that subtly changes the colour of your computer, tablet and phone screen to help you sleep well. With Michael Herf of f.lux. http://justgetflux.com/linux.html http://www.radionz.co.nz/national/programmes/thiswayup/audio/2578136/f-lux