Would someone enlighten me as to if any of the coach builders added tunnel lights and ditch lights to their ambulances in this manner? I pulled these off a fire dept. rescue truck body mounted on a 1974 one ton Chevy. The only id was the sticker in the door jamb, and it was beat up, but it looked like Collinsburg? had built the body. The lights seemed to be just a piece of stove pipe with three mounting tabs, and either a red or clear bulb in a Unity S6 trim ring. I thought they looked similar to the ones used on Cotner - Bevington set ups.