i have them tapped into my cab lights. the cab lights are ignition hot wired, so no needing other lights on to have them on. same for the grill. i'll take pics of how i wired the lights to the grill and all that when i get home. used super glue to hold the wire to the grill, and a few self tapping screws w/ some wire loops to keep everything where I wanted it, then just tapped my existing wires.