The Cambridge PIR Motion Sensor Light by It's Exciting Lighting is a battery powered alternative to hardwired lighting fixtures. Add lighting in those tough and expensive hard-to-wire places like inside/outside your garage, basement stairways, dark corners, closets and more. The Cambridge is easy to install and indoor/outdoor friendly - so you can add lighting whenever and wherever you need it. Die Cast Aluminum construction with black finish Frosted plastic lens PIR function (passive infrared) 20 White LEDs 3x D type battery (not included) Photo cell ensures light is only triggered by motion during hours of darkness (e.g. dusk to dawn) so battery will not be drained during the daytime LED output: 200LM / 400LM two modes 3 modes to adjust light-up time: 30sec, 60sec, 120sec Number of illuminations for each mode: (times based on using Duracell or Energizer alkaline batteries) 200LM setting: 2400 times for 30s, 1200 times for 60s, 600 times for 120s 400LM setting: 1800 times for 30s, 900 times for 60s, 450 times for 120s