A LOT of bench space and pegboard for hanging tools. One curious thing
about
my hangar. I have an overhead light. When I raise the door, it vibrates the
hangar and the light goes OUT!!! It comes on by itself later on. It is not
an incadescent light, but it is not a long tube flourescent either. Looks
more like a streetlight. Why would it do this?

Bob,

Based on the info you provided ... here's my wild guess: you might have a
mercury vapor or metal halide lamp. They take a few minutes to warm up
before you get light. If you have an intermittent contact (loose wiring,
socket etc), then the bulb will shut off and come back on in a few minutes.
It could also be defective.

Here's a good link. You can probably identify your bulb throught this link
(or others):

http://www.neon-lighting.com/article...of%20Lamps.htm