The automatic safety night light will help light the way from dusk to dawn with its cool burning 4 watt bulb. The night light mounts directly over the outlet wall plate thereby preventing access. The bulb is fully enclosed for safety and the bulb comes with a 3 year guarantee. Note, this item is for use with duplex receptacles with center-screw wall plate mounting. Use only with plastic wall plates. The night light measures 4 and one quarter inches x 2 and one half inches x 2 inches.