I'm a damn light sleeper. I use ear-plugs otherwise the return tube noises wake me up every hour. I'm talkin those thick ones that you have to compress hardcore to fit in your ear. The reason I like this is because instead of hearing random noises, and pumps/nutes going down the return every hour, the earplugs cause you to hear your own breathing, and nothing else, and that's plenty white noise for me to sleep. That's my insomnia cure! Plus killing a 6 pack and kief bowl before bed. :stoned: