Vintage round ball shaped light fixture or lamp.  Metal plated or painted silver or chrome.  Some loss of chrome plating.  Works great, but the plug has been taped and probably should be replaced for safety.  Approximately 7" in diameter.  It currently has a blue floodlight bulb that will be included.  It would be great for a black light bulb for a groovy, retro decor!

I don't find a manufacturer's name on it, but it looks like a Steber Orblite.