Large vintage industrial gas station or barn ceiling lighting fixture. The green and white shade has porcelain enamel and a black rim around the edge. It measures 18" across and is 12" high over the light fixture and about 14.5" high overall.
This light fixtures has a large mogul size socket, but also includes screw-in socket adaptors for edison base (regular) light bulbs for increased lighting flexibility.
The shade fixture does have a large of damage and loss to the porcelain enamel as well as some minor chipping to the enamel around the rim.