The Keystone LED Shop Light is a fully assembled, sleek, energy efficient light fixture that is an ideal replacement for outdated fluorescent models. They include all necessary mounting hardware, reducing the installation time to minutes. It also features a 6 foot attached power cord with the convenience of an on-off pull chain. Delivering 4,000 lumens of cool white 4000K light while only consuming a minuscule 40 watts. With a 5 year warranty, you can definitely install these and not worry about any replacement lamps or parts.