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Photocells are a type of sensor designed to detect the presence of light. They are small inexpensive accessories that can be used with light fixtures to turn them on or off depending on the time of day. We offer many different types and styles of photocells in our Lighting category.
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MP39063 Area Lighting CPGI-ALR-LC-120 Photocontrol AmerTac SLC4CB-4 Dusk to Dawn Light Control Socket
MP39056 MP39057 MP39058
AmerTac 758CTC-4 Dusk to Dawn Post Eye Light Control Area Lighting CPGI-ALR-AA-305 Post Security Photocontrol AmerTac LC120BC-4 Dusk to Dawn Twist Lock Light Control
MP39030 Area Lighting CPGI-ALR-PL-120S Photocontrol AmerTac 758M Post Eye Light Control
Area Lighting CPGI-ALR-AA-105 Post Collar Photocontrol Area Lighting CPGI-ALR-PL-120S- Photocontrol AmerTac SLC5BCW-4 Dusk to Dawn Light Control Socket
Area Lighting CPGI-ALR-LC-208-2 Thermal Bimetal Photocontrol AmerTac 758FPCTCC-4 Dawn Light Control AmerTac OLC5CFLBC-4 Dusk to Dawn Floodlight Control Photocell
AmerTac SW103CTC-4 Dusk to Dawn Swivel Eye Light Control MP39040 Area Lighting CPGI-ALR-TL-115 Swivel Mount Photocontrol
MP39069 AmerTac SLC6CBC-4 Programmable Light Control Socket Area Lighting CPGI-ALR-SPT-15 Thermal Bimetal Photocontrol
Area Lighting CPGI-ALR-AA-105W Post Collar Photocontrol MP39060 Westek AT15BC-4 Dusk to Dawn Stem Mount Light Control
MP39010 MP39070 MP39042
Area Lighting CPGI-ALR-OLC-5C Photocontrol MP39052 Amertac SLC2BCB3-4 Light-Sensing Socket Reducer Socket Adapter
MP39062 MP39012 MP39020
MP39032 HLP Photocontrol, Twist Lock MV Utility (Long Life Version), 120-277VAC, 1.5fc T MP39050
MP39053 MP39011 MP39022
MP39051 Heathco HZ-5690-AL Light Fixture Arm Extension Heath Zenith HZ-5697 Dusk to Dawn Replacement Photo Control Twist Lock
MP39106 MP39013 MP39104
MP39102 MP39101 Bell 5638-5 Swivel Mount Photocontrol
MP39107 MP39103 MP39072
MP88060 MP39112

History of Photocells

The modern photocell has remained mainly unchanged since they were first invented and introduced over 40 years ago. The main reason they were invented was to control outdoor lighting fixtures so that they were lit dusk to dawn, therefore saving power and the bulb's lifespan. The operation of a photocell is fairly simple. There is a current flowing through a closed electromagnetic relay. When the cell is exposed to sunlight the resistance is zero and therefore there is no current flowing to the fixture. When the sunlight is gone the opposite happens and power flows freely to the light.