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.