Idea for Christmas Lights - Save Energy?

Did you ever notice how rural homes have their Christmas lights going all the time on the outside of their houses, even when no cars are passing by?  Maybe have a photo eye near the road to turn on the Christmas lights when a car approaches the house and turn the lights off some time after the car has passed.  This would save electricity.  Think of a car going down the road - When the car driver is about a quarter mile from your house, your decoration lights would go on and stay on as long as the driver is nearby.  After this car passes, the lights would go off until the next driver approaches.
Possible Start Building Blocks -

• Existing concepts for humorous motion-activated fish or deer, motion-activated outdoor lighting, etc.


• USPTO Class/Subclasses for "How-To" ideas - 362/123, 315/185S, 362/276

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