Looking at computer screens late at night, and thus a daylight spectrum of light (approximately 5500K color temperature) late at night? Well, that can hinder your sleep since your body thinks its still daytime. "f.lux" fixes this by adjusting the color of your computer's display to adapt to the time of day, warming up the color temperature at night and keeping it cool sunlight during the day.
It can also be used in accordance with home lighting as well.
f.lux - https://justgetflux.com/