The ANSI C 136.41 Nema Twist Lock Photocontroller JL-207 series is applicable to control the Street Lighting, Passage Lighting and Doorway Lighting automatically in accordance with the ambient natural lighting level, and midnight sleeping timer settings. This product is designed with microprocessor circuits with either sensors of CdS photocell, photodiode or IR-filtered phototransistor and a surge arrester (MOV) is provided. Its quicker response with time delay of 0-10 seconds for turning-on offers easy-to-test feature. Further, a preset 5-20 seconds
time-delay for turning-off might avoid mis-operation due to spotlight or lightning during the night time. This product meets the requirements of ANSI C136.10-2010 Standard Interface. Locking Type Photocontrol for Use with Area Lighting UL773, Listed by UL for both US and Canada markets.