These are the easiest to install ceiling lights yet! Nails imbedded in the globes allow pounding of the fixture directly into a tape run with no additional wiring or electrical connections. Apply power and, presto, you have an instant working ceiling light. The CK841 globe is approximately 1/2" in diameter and the CK842, 3/8". Each contains a 12-volt GOW bulb drawing approximately 60 ma of current.