TL;DR
A photocell control is a light-sensing switch that turns electrical loads—most often outdoor luminaires or signage—on at dusk and off at dawn without a timer or manual input. Its sensing element changes resistance with ambient light, closing a relay once levels drop below a set threshold of roughly one to three footcandles.
What it means
A photocell control is a light-sensing switch that turns electrical loads—most often outdoor luminaires or signage—on at dusk and off at dawn without a timer or manual input. Its sensing element changes resistance with ambient light, closing a relay once levels drop below a set threshold of roughly one to three footcandles. Electricians install them as screw-in socket adapters, twist-lock receptacles atop area lights, or hardwired units feeding a lighting contactor.
Where it sits in the glossary
Photocell control is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
ProFix tools that touch this term
See also
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