Applies To
All Photocontrols (hardwired and locking-type)
Question / Problem
Why are the lights I have connected to a photocontrol cycling on and off?
Safety Warning
Warning: Turn off power at the circuit breaker before inspecting or correcting wiring. Failure to disconnect power may result in electrical shock.
Common Installation / Application Conditions
Outdoor lighting controlled by a photocontrol. Cycling may occur during daytime or nighttime depending on wiring configuration and light placement.
Step-by-Step Resolution
Determine When Cycling Occurs
Observe whether the lights controlled by the photocontrol cycle during daylight hours or only at night.
Inspect Wiring If Cycling Occurs During the Day
Daytime cycling typically indicates that the LINE and LOAD connections at the photocontrol are reversed. Correct the wiring so LINE and LOAD are properly connected.
Check Light Feedback If Cycling Occurs at Night
Nighttime cycling typically indicates that the photocontrol is exposed to excess ambient light or is being triggered by the light source it is controlling.
Correct Photocontrol Placement
Adjust the photocontrol, fixture placement, and/or shielding until the control turns ON and OFF at the desired light level trigger.
Tips / Additional Notes
- Mount photocontrols so they face natural daylight and not directly toward the controlled light source.
- Verify all wiring connections are secure and follow the installation instructions for the specific photocontrol model.