Programmable lighting
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Programmable lighting

There are tons of obviously good uses for this, but maybe my favorite is that you can set them to become warmer after sunset to help maintain your circadian rhythms, and then dim as a reminder to start winding down for bed (and of course you can use them as an alarm to wake you up "with the sun" in the morning).

They’re expensive, but I use the Hue full-color system from Philips. Really easy to set schedules from my phone, though I also highly recommend getting a physical