The DirectDrive series of HID LED lamps by Keystone Technologies are an excellent choice to upgrade your fixture to long lasting, energy efficient LED illumination. Being wattage selectable, this lamp allows the user to select between 3 different wattage and resulting lumen output levels to suit their preference. This lamp is designed to replace up to 400W metal halide HID lamps. The internal driver eliminates the need for an external driver or ballast - allowing users to install this lamp directly into existing fixtures - and an integrated heat sink efficiently dissipates heat and guides intrusive water out of the lamp.