Do you mean in your house, or in your garage?

For in your house, there is an automated home system you can purchase, X10 being one of them...

for outside, You can buy sensors that will turn on the lights when you drive the car into the driveway or even walk in the driveway. We have 2, 75 watt Halogens up high on the garage and each has it's own sensor to turn it on.
You can buy these sensors (Motion detectors at Home Depot-- about $20, as I recall.
They are easy to install and you could also do one inside the garage too, should you wish.
Good luck!

Gary