Abstract: A lamp and lamp driver are disclosed, in which single intensity marker lamps that are desired to be flashed can be connected to a lamp driver employing an exclusive OR (XOR) logic circuit. In one application, this lamp driver is coupled to a vehicle turn function wire and marker function wire, and a plurality of marker lamps in a row can be of the same style, but one lamp can be flashed in the row of marker lamps. In some embodiments, if all of the marker lamps are on, the lamp being driven by the XOR driver circuit will flash out of sequence with the turn signal flash. If all of the marker lamps are off, the lamp being driven by the XOR driver circuit will flash in sequence with the turn signal flash. Other embodiments are disclosed.

Abstract: A lamp assembly for attachment to a vehicle, comprising a lamp which includes a housing having an axially extending member, the axially extending member extendable through an opening in a vehicle mounting panel and below the vehicle mounting panel. An anti-theft collar is included around at least a portion of the axially extending member, the collar being securable to said axially extending member. The collar has a first set of projections to snap fit attach to the vehicle mounting panel at a first depth and a second set of projections to snap fit attach to the vehicle mounting panel at a second depth.