For anyone who has installed a 900 series or anything on an ambulance, or fire engine, etc. etc. What do you use to cut through the skin on the vehicle. One should avoid making sparks right? Or does it matter?
are you installing a 900 strobe or halogen, or a surface mount LED version? If its just the LED version, used a 3/4 or 1" hole saw.
For a Strobe or halogen, drill a quarter inch hole in the body and then use a jigsaw and cut teh body out. Or if the skin is thin enough, you could use tin snips or shears. but then you would have to file down the sharp edges.