Since you have 'open options' for lighting, why not do three types?
Metal halide for general, fluor for task lighting, and halogens for paint inspection...
I've seen 300 watt halogens mounted on a Rotary 2 post lift. at about 4' high, 2 each post , 1 up and forward, 1 up and back.
Careful! They do get HOT.
I can't imagine not having a drain...
Jim