I don't understand how people are able to get a good night's sleep without decent curtains/blinds, or with a bunch of bright blue LEDs scattered about the bedro

I don't understand how people are able to get a good night's sleep without decent curtains/blinds, or with a bunch of bright blue LEDs scattered about the bedroom. There's a power brick with an orange indicator light in my bedroom, and I had to black it out with tape because the light bugged me at night.