when i replaced my dome light, i found a marker light for a semi, it was about 3.5" x 3.5" either strobes or solid, i put it in the dome, hooked it up to a toggle and put the whole light where the old bulb would go. the light was SUPER bright, actually would light up the driveway around the car at night, but wasnt to effective for the rear seats or trunk, so after looking around the car (because my trunk light wont work either) i decided that if i bought another of the marker lights $2.00 at Olly's)and fxed it the the rear window at the top with the 3m pad it came with, it would shine in the back seat whet the trunk was closed and it would shine in the trunk when opened. flawless system.