Rare NEPO Clamshell Vintage Street Light Fixture Luminaire Mercury Vapor. This street light is used and has corrosion/rust. The glass is in great condition and probably the best condition that will ever be found for this fixture. These are rare and I haven't found much if any information on them. They can be ran mercury vapor with a remote ballast or whatever light source you choose to use. Thank you for your interest in my listing. If you have any questions just ask. SORRY NO RETURNS/REFUNDS