The Westgate Mfg PC-B is a button-style photocell for standard 120V outdoor fixture applications requiring automatic dusk-to-dawn switching. Rated at 500W with a plastic housing, it operates across an ambient temperature range of -40F to 158F, making it suitable for a broad range of climates. Carries a 2-year warranty and fits standard photocell knockouts on wall packs, floodlights, and post-top fixtures.