The TORK 2021 provides professional-grade performance for a range of residential and commercial applications. This stem-mounted mechanical photocontrol light sensor automatically detects nightfall, allowing you to run exterior lights from dusk to dawn. Use TORK 2020 series photocontrols for applications where it is essential to aim the photocell in an exact direction to sense natural light but avoid artificial light for controlling flood and patio lamps or decorative lighting. The TORK 2021 saves you energy and money, while adding security to your property at night with a time delay feature that prevents car headlights or other stray city lighting from accidentally turning the sensor OFF. The 1/2" conduit mount is easy to install and features a 180-degree swivel for greater flexibility. This sensor's molded Lexan® housing provides excellent weatherproofing. Rated for 120VAC. When choosing a photocontrol light sensor, trust in the reliable name of TORK, a pioneer in the industry since 1922.