I live about 5 miles from a small airport. At night, during rain or snow storms when I imagine there would be poor visibility, I always turn our outside house lights on, in case they could possibly help a little plane in distress. Am I crazy?
Yes we can see lights on the ground from small planes, but your extra lights do not help approaching aircraft. If anything they may serve to disorient pilots. In low visibility situations, provided the pilot is properly rated and the aircraft is properly equipped they may be flying IFR. Under these types of operations when popping out of the clouds we may be looking for runway lighting. Other lights on the ground can (and have been) confused for runway lights in the past.
They can see your lights, but they don't help. "Black hole" approaches (where there aren't any lights on the ground except for the runway) can be difficult and unnerving, but even if that's the case for that airport, one set of house lights isn't going to appreciably affect the situation.