on the trunk would be a lot harder. On the bumper (another idea i thought of very late last night) maybe two saturn back up lights would look nice. Like on the newer SC2, two round back up lights on either side of the bumper? On the trunk would be harder to place. Might be cool on an OEM style wing, have it in the light bar (either a clear/diamond cut lens on a lighter color car, or a hyperblack/tinted diamond cut lens on a darker car) or possible a single bar across the top of the trunk? If you got ideas, tell me and i can try them out