This cleverly designed pair of lights contains radio communication technology. This means the two lamps are wirelessly connected via radio link, so when one lamp is activated the other will automatically activate at the same time (Max signal distance between the lights is 15m). It’s late at night and you want to head down to the kitchen for a glass of water but don’t want to wake the whole house by turning on all the lights. How do you get down the stairs in the darkness? With these lights you don’t even need to touch a switch, they will automatically detect movement from 2.5m away and simultaneously illuminate the top and bottom of your stairs. They then turn themselves off after 20 seconds of inactivity. They come with easily installed backplates that allow you to remove and replace the lights, meaning you can even use them as an emergency torch. These are the ideal lights for safety and security in your house. Light source: cool white LED (6000K).