High efficiency T5 High Output or T8 fixtures engineered for premium performance in medium and high ceiling applications ideally suited for warehouses, manufacturing plants, sports facilities and retail spaces. A precision-formed reflector system available in either highly reflective mirror or enhanced white reflector achieve maximum light output for ceilings from 15 feet to 40 feet. The unique lamp arrangement is ideal for wide area lighting to put the light exactly where you need it with less fixtures. Based on ceiling height, these fixtures can replace an HID high bay using half of the wattage. Surface, pendant, chain or stem mounting. Optional wire-guard allows easy lamp access. Highest quality materials and workmanship.