eh... DIYing this isnt hard ler.... but u need to have some knowledge on wiring... n know how to mount de tubes under ur car.. try dig out the old thread about undercarriage lights... there are quite some discussion n pictures i have posted there....
u'll need a on/off switch, relay, fuse, wiring, DC chokes, flourescent tubes n water hose for protection.... n also steel band for mounting brackets...
pls dun use spot lights as they take up quite some amount of current n will drain ur battery fast n need bigger n proper wiring... i think it is not practical as spotlights will heat up n may be a hazard if de lights are near to fuel lines..