Black & Decker has released a number of energy saving and monitoring products as part of their Energy Series. We've already covered the Thermal Leak Detector and the Power Monitor so now we're moving on to the last of the line, the Black & Decker AutoSwitch.
The AutoSwitch is a unit that you place over an existing light switch which converts it to a motion sensor light. The unit has a switch, so there's still a manual override and you also have the ability to set it to a sensitivity of 1, 5, 15, or 30 minutes.
If you're the type who comes home from vacation and realizes that you left every light in the house on for over two weeks, then it might be a product worth looking into.