The DNS10 is a 10A Day/Night Control Switch that can turn] the lights on at dusk and turn off the lights at dawn, and has a light control setting from < 5 to 50 Lux. It is not only convenient but also practical as it can turn a bank of lights on and off automatically, especially when manual control becomes physically tedious due to large distances involved. DNS10 Day/Night Sensor is ideal for light industrial, commercial, housing applications, office or park lights, street lights, garden lights and outdoor lighting.