![]() Time sensors come on and off at specific times. ![]() Photocells can be replaced or used together with time and motion sensors. Install the photocell into individual sockets and that’s all. If you do not own a dusk-to-dawn lighting system, you can convert your existing fixture into one.Īll you need is to get a photocell that can be screwed into bulb sockets. Now, some photocell sensors let you decide the level of light that can activate the photocell. This action triggers the lighting system to come on. The current flow stops as the light goes dim. ![]() ![]() This action causes the lighting system to go off. Here is how it works - when a certain amount of light hits the semiconductors, current flows. All photocells use semiconductors to control current. Although photocells are of different types, they have one basic principle - Semiconductors. Photocells are what tells the lighting system when to come on and when to go off.
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