The TORK ZSS124 stem and swivel mount instant response LED photocontrol light sensor provides a simple way to control residential or commercial exterior lights and appliances based on the ambient light level. Features include the coated circuit board and weather-resistant casing, long-life zero-cross technology and the time delay that prevents stray lights or shadows from triggering the control. Designed for applications including landscape lighting, perimeter and security lighting, pole lanterns or signage.