i had seen an add for a kind of blindfold you wear when you go to sleep. it senses when you get to rem sleep, then turns on an led. this is supposed to allow you to lucid dream. does anyone know if this works?

do you have a link for it?
just wondering, I've never heard of such a device

sounds cool/expensive. but ya find a link i wanna read on that. ive been tryin for a while also so i would get it.