Made by: Pass & Seymour LeGrand.  8" tall x 5-1/4" round at bottom of fixture.  Rubber insulated lamp holder socket (660W, 600V) with rubber coated metal hanging basket.  Use for construction overhead, temporary lighting, garage, building, shed, canopy, etc.  For indoor or outdoor-(if protected from adverse weather conditions).  Accepts screw-in bulbs: incandescent, fluorescent, LED type. I have (5) left from case of 24.  Price is per light fixture.  (Bulb not included).