This little light is about 7 inches tall by about 5 inches wide. The base has two mounting lugs that are 3 1/2 inches on center of each other.  To access the bulb, simply spin off the top section of the light.  The cage and globe spin off as one piece.  This light weighs about 3 1/2 pounds. The globe is glass and has a couple of cracks on one side.