Oxymoronic, I know. Coming up for our production of Musical Comedy Murders of 1940 There are several scenes where there are power failures, and hence a blackout. The director and I agree that the stage should not just go dark and risk losing the audiences attention, plus there are murders going on during the blackout so we want to add to the excitement. I'm thinking some high dark blues from behind mostly for this, but I really have no idea where to start. My biggest problem is that there the stage is almost completely surrounded by 8 ft. walls for the set. Yes, I know the policy on not telling how exactly to design but any suggestions would help, especially working around the set.