The Westgate Mfg PC-1 is a 120VAC twist-lock photocell rated at 1000W, providing automatic dusk-to-dawn switching for outdoor area lights, wall packs, and pole-mounted fixtures. Designed for direct twist-lock receptacle mounting, it operates across a temperature range of -40F to 158F for reliable year-round performance in commercial and industrial outdoor applications. Plastic construction with a 2-year warranty.