I'm a light sleeper and the ac/heat/fridge/hallway/street noises used to bother me. Now I travel with earplugs. I don't mind a little glow from the clock or the fridge, that I can sleep with. In fact I usually leave the drapes cracked open just a tiny bit so that the gradual lightening of the room wakes me in the morning w/out the need for an alarm. If I want to sleep in, I overlap the drapes and clip them together with a hair clip or one of the closet hangars with the clips on it.