Description Driver side with license illuminator; Submersible design suitable for many applications; Screw-on lens, easy to change bulbs; Mount on 2" centers; Grounds through mounting studs; Shock-proof socket guarantees long bulb life; Acrylic lens and corrosion proof plastic housing. Combination tail light for over 80" wide trailers Stud mount design, mounts on 2" centers Grounds through mounting studs Shock proof socket extends bulb life Screw-on replaceable lens, replaceable bulb 12VDC