IMO, You'd be better off running a separate circuit.....
From battery pos post or battery post on starter solenoid to a 15/20 amp in-line fuse, Run to a cigarette lighter plug or toggle switch depending which style light you have (portable/mounted).
This way doesn't put any extra draw on the unit wire harness and gives full 12.5+ volts to the light.....
Originally Posted by piston slapper
You never learn anything until you admit you don't know it all...
"Why go out preserved when you can go out beat up, worn out, sliding in sideways screaming, Holy Sh!t What A Ride" !!!