Nothing wrong with the more efficient light bulbs. Especially if it would reduce household power usage. Tho, considering you now have to have a 1kW power supply to run your new gaming PC, it pretty much evens out.
Electrical lights burn up a lot of money. I only buy compact flourescents now. They do a great job for 1/4 the energy burn. CFLs are pretty cheap now, too.
Motion detector switches help too. I use those outdoors, due to crime and our border security (thanks Bush).
We had a sound activated switch for the garage door once. When we approached the house and activated the garage door, the light went on. Then it went off later. Kids loved opening the door to the garage and shouting, turning on the light. We donated that switch to our niece and nephew.