My Avalanche has lights mounted in the bottom of the mirrors on the doors. They're quite effective in lighting up the area around the vehicle even when approaching with the door still closed as they come on when you use the key fob to unlock the doors. I wouldn't mind adding something similar to my other vehicles as well. Found this at Autozone:
http://www.autozone.com/R,NONAPP379...uctDetail/shopping/accessoryProductDetail.htm It may be possible to attach to the bottom of the mirror, but running the wires into the doors may be difficult on most vehicles.