I've pondered this home security question for a long time but I don't have a good solution. To give your home that "someone is home" look, you can leave the lights on and leave a radio or TV on.
I was wondering if there is a product that would mimic the varying flickering glow of a TV set, without actually having the TV on. Today's big screen TV's use a lot of electricity, plus some types, like plasma, wear out the phosphors the more you use them, so I'm wondering if there might be a more energy efficient option. Something that will show that flickering glow around the edges of the closed curtains/blinds, or up against the ceiling if someone were looking up at a second story window with open curtains.