they are black rubberI have put in all of my blazers, and now the avalanche a set of aircraft landing lights behind the grill. they will light a road sign for two miles, and the light pattern from the aircraft bulbs is narrow like a cats eye. No I don't blind other people with them, but late at night its nice to light the whole block up. I get the bulbs from Grainger for about 20 bucks each and the mounts from NAPA they are black rubber and about 30$ each. I used a continuous duty solenoid mounted under the drivers side fender, firewall brace, and got 12volts from the alternator feed box. the hardest part was pulling out the avs grill. there are clips around the edges that are hard to pop loose. the mounts go in sideways, and the lights behind the grill are in line with the stock headlights. i can dig up the part #s or post a picture if anybody wants to "light up" their av