In my bedroom I use knockoff RGBW LED lightbulbs (I found some on amazon for $30 that work with a semi-sketchy app called Magic Home). You can set timers for different colors on the app, so in the morning they go bright blue and before bed they all go red. They also have a brighter white LED for daytime usage that's only slightly dimmer than normal bulbs.

It's pretty nifty. They're controlled over some UDP protocol that some people have had some success reverse engineering as well.