18" Aluminum hood with silver powder coat finish. Aluminum cast heat sink for excellent thermal management. High Output COB LED's. High power factor, low THD driver with 6kV/3kA Surge Protection. Instant-On flicker-free Cold Start and Hot Re-Start. Bright white light (5000?K) for greater visibility and safety. LED engine design with Advanced Thermal Management. Up to 15 year maintenance free operation.