Bright idea?

I printed my theatrical lighting plot onto a T-shirt.  That way when I'm working on the lighting rig, I can just refer to it.  Better yet, I can point out certain lights or circuits to the other lighting techs I'm working with.  But I must admit that the old lamp doesn't shine as bright as it's aged so in those moments when you stop to try to remember what the hell it was you were working on, it pays to have the plan within view.