Intermatic LC4521C 120-Volt Locking Type Thermal Photocontrol<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Locking style thermal photocontrol provides dusk-to-dawn ON/OFF control of exterior lighting， street lighting， parking lot， pedestrian pathway and landscape lighting</li><li>Delay feature prevents unwanted OFF switching of lights due to passing car headlights or lightning</li><li>Twist lock plug for quick installation and changeover features integral high-impact thermoplastic housing</li><li>Features a cadmium sulfide photocell and a mechanical bimetal switch</li><li>Not for use with LED lights</li></ul></div><img src="http://ecx.images-amazon.com/images/I/419VUGPyd0L.jpg" noproxy>