The CXB Series LED Low-Bay/High-Bay luminaire delivers 18000 median and 24000 median lumens with illumination performance to allow one-for-one replacement of 250W and 400W HID luminaires and multi-lamp fluorescent low-bay and high-bay fixtures. With exceptional rated lifetimes, zero restrike time and a compact lightweight construction, the CXB Series is a direct replacement for incumbent HID and fluorescent light sources that provides additional benefits of energy savings and significantly reduced relamp maintenance costs; 16 IN round LED high bay luminaire; Designed to operate in temperatures between 0 DEG C and 50 DEG C; Integral, high-efficiency driver and power supply; Low-profile, lightweight design provides ease of installation; Die cast aluminum heat sink; Factory calibrated to hang straight; Power Factor Greater Than 0.9; Total Harmonic Distortion less than 20 PCT; Suitable for damp locations