im gonna go with the sensor light idea and keep them in an area were there are lots of plants but still got at least 8 hours of direct sun light. My buddy who also grows a lot of weed gave me an idea to put bells on strings and put a baby monitor outside and just keep the volume really high inside. I also have a dog that barks at every little thing that moves in the backyard. Or maybe I should just pitch a tent in my backyard and sleep right next to the damn things. that would solve the problem.