Occupancy vs Vacancy vs a Photocell

Quick answer: Occupancy turns lights on and off automatically. Vacancy only turns them off. A photocell reacts to daylight, not people.

Watch on YouTube →

Shop occupancy sensors on eBay

Want one lesson like this every other week? Join the newsletter.

Safety note: Content is general education, not professional advice. Always turn off power at the breaker before working on any fixture or device. Line-voltage work should be done by a licensed electrician and must follow local codes.