Solid brass shell. Light activates when motion is detected, light timer shuts off light after selected time of 1, 5, or 10 minutes after motion stops. Automatic photocell deactivates unit in daylight. Pulse count technology reduces false sensing from windand rain. Manual override turns light off or on with existing indoor wall switch to stay on all night when needed. Up to 30 ft range from hidden 180° motion sensor. Uses one medium base bulb, 100 watt maximum. 16.375 in height x 6.5 in width x 7.875 in depth.