With an energy-efficient, one-year limited warranty, and a 50,000-hour long lifespan, this lamp is a great addition to your home or work space. It's built with a photocell sensor that automatically turns on at night and off during the day for increased efficiency. It features a heat sink temperature of 65˚C and operates from -20˚C to +45˚C, so it's perfect for just about any climate. With a 120 degree beam angle and 5000K cool white color temperature, this bulb will provide bright, even light for your space. The built-in dusk to dawn photocell sensor allows you to turn this bulb on when it gets dark outside without having to worry about forgetting the switch—and turning it off when the sun comes up so you don't waste money. This bulb is ETL certified, DLC certified and comes with a one-year limited warranty.