... is applicable to control the lighting automatically in accordance with the ambient natural lighting level Certificates:ETL1, Printed circuit board ... 2, Silicon controlled switching 3, Intended to control lighting fixtures with natural lighting level, with quick response 4, CdS photocell 5, ... E26/27 (screw cap and shell), various enclosure with clear sensory eye 6, Rated voltage: 110 - 120V AC ...