Let me guess: you've switched from yellow light to white light?
White lights emit more blue light than yellow lights, which can negatively affect your sleep. It's the real-world equivalent of uninstalling redshift/f.lux on your device.
I've invested in "smart" LEDs and I change their color based on the position of the sun. If the sun is up, the light is white. If the sun is down, the light is dimmed orange.
As I understand it, even though LED output is yellow, the primary light range emitted is blue. No idea if this study [1] is good, but the abstract explains it a bit.
