I’ve got a few landscape light posts with a 1.5” male screw connection on top. Does anyone have an idea where I could find screw on lanterns?
It's not clear to me what you have. Do you have risers or do you have the actual stems of landscape lighting fixtures including the lamp socket and lead wires? In any event, I'm not aware of any company that offers a lantern fixture top or head independent of a post. HTH