I have a radio on the headboard and listen to a local talk radio station which broadcasts "Coast to Coast" all night. I have awoke from a bad dream on occasion to find the talk show host and guest were discussing the subject of the bad dream. e.g. one night I dreamed I was in a haunted mansion and ghosts were after me. That was the subject of discussion going on on the radio. So not only will the light be a problem, the programming can have an effect on your dreams and could be causing subliminal problems when you're awake.