> The harsh blue light now tells my brain it's daytime. I had to buy blackout curtains to be able to fall asleep.

When I moved in with my fiancee (at the time my girlfriend), I noticed after a couple months that I had a bit of trouble sleeping due to her often falling asleep later than me and being on her laptop for a bit. Since blackout curtains don't help with that, I bought a sleep mask for a few dollars from Amazon (basically a piece of nylon fabric and a strap, nothing specialized), and it's not an exaggeration to say that it's been life-changing. As a child, I'd often struggle to fall asleep due to literally any amount of light in my bedroom, and when I was in elementary school it got bad enough that it would take me several hours of lying in bed to finally fall asleep, and I ended up getting prescribed insomnia medication that I continued taking for a couple of decades. It turned out that with the sleep mask, I was able to taper off the prescription sleeping medication within a year or so, and I'm even able to get up earlier without being quite as groggy due to my quality of sleep increasing so much.

If anyone else has similar issues with lighting interfering with their sleep, especially if it's from things within their building rather than outside, I'd highly recommend investing a few bucks to try this out. Obviously my sample size is only one, but given how drastic the effect was and how low-cost it is to try out, it would almost feel irresponsible for me not to suggest this to people.