The top-of-the range Optimal One Street Lights come with a Passive Infrared Detector: The LED lights shine at a chosen brightness level until activity is detected, at which stage they switch to 100% brightness, extending the life of your battery as well as alerting you to movement if used as a security measure. Perfect for new builds or retrofitting to existing installations - the angle and direction of the solar panel on this unit can be changed to suit your orientation, as can the direction of the LED light. Fits on to any pole or wall with ease. Read more here >>