Proof That It Always Makes Sense To Turn Off The Lights

This is an old episode, but I recently had a discussion with a friend on this very topic so I thought I should post the answer here. The question: does it ever make sense to leave a light bulb on when you leave a room if you are going to come right back? The simple answer: NO. I'll leave the rest up to the MythBusters:

Mythbusters lightbulb experiment - Watch more Videos at Vodpod.