Mustang Dome Light (Lazy Mans Way)
 

I just needed a brighter light in my truck; the single bulb wasn't cutting it.
I got this dome light out of an F-250, and since I have my relay and inline fuse in that side panel area I didn't want to add another wire to that location. So i just bridged the center light to the map lights on the dome light. If you don't mind the switches for the map lights only working when the center light is on this works great.

3 bulbs are better than one :D