This category lists manufacturers whose flagship products are high bay light fixtures designed for use in buildings with high ceilings, or "high bays" such as warehouses, manufacturing facilities, convention centers, storage facilities, recreation centers, aircraft hangars, exhibition halls, athletic facilities, gymnasiums, big-box retail stores, and supermarkets, etc. Many industrial facilities and commercial buildings have the burden of illuminating large areas from high ceilings where the ceilings can be 30-40 feet high. LED high bay lights provide many advantages over conventional HID lighting systems, including reduced power consumption, higher luminous efficiency, longer life, more flexible lighting control, less maintenance, and inherent durability. UFO LED high bay lights are evolution of the first generation high bay LED lights with similar form factors of traditional metal halide, sodium, or fluorescent high bay lights. The sleek, low profile, and streamlined design of UFO LED high bay lights offers enhanced aesthetics that brings a touch of sophistication to modern industrial and commercial settings. UFO LED high bays generally feature a purposefully designed structure made of die-cast, low copper aluminum alloys to facilitate heat dissipation. Linear high bay lights are designed for open storage facilities and high rack buildings where the tall narrow aisles established by rack storage systems require relatively uniform vertical illuminances. With precision designed optics these highly configurable linear fixtures provide multiple options of light distributions that allow for outstanding optical control. Lighting control through integrated daylight and occupancy sensors enables greater energy savings and flexibility in fixture management by customizing light levels and managing grouped fixtures.