Bedroom Light is from my first full Mentalism book titled "Edison Notes" which came out in the summer of 2017.
Bedroom Light is a presentation angle that allows you to get more out of your standard routines. With it, you'll be able to reveal details of any room a spectator thinks of in their house. This doesn't involve spying on your participants or psychologically forcing them to think of a room.
You can't fail with the structure of the routine, but you'll get a couple Outs to boost your confidence.