This is an oldy , moldy topic! Have the nose off persuing another project (seat latch cables) and got curious about these lights with the silvery bulbs. I have spouted more than once these are purposely burned out to get the silvery look but they are not! They are amber bulbs! Single contact, bayonet 1156 type auto lamps that have intact filaments. Both wires go to ground so there is no way for them to work.
WAY! I think I'll hook 'em up to low beams.... too much trouble to hook them to signals.