A high bay luminaire is a kind of lighting fixture often used in industrial settings that are elevated above the floor or work level. Commercial or industrial lighting is often categorized as either high bay or low bay based on the notional height of the fixture above the floor of the area it is intended to illuminate. High bay lights are appropriate for situations where the ceiling height or roof trusses are higher than around 7.6 meters (25 feet) above the floor, or when the spacing-to-mounting height ratio is up to 1.0. Surface-mounted or pendant-mounted LED high bay lights are used, depending on the layout and openness of the space. Depending on the application and the need for vertical illuminance, these luminaires may produce luminous intensity distributions that are narrow or broad using reflectors and refractors.

In high-bay locations such as warehouses, factories, gymnasiums, workshops, plants, supermarkets, distribution centers, sports fields, squares, public spaces, airport halls, and building sites, LED high bay lighting offers an energy-efficient option. Leading companies such as CREE, Bridgelux, Osram, Sumsung, Nichia, Philips, and Epistar provide high-quality SMD or COB LED light sources that have low light decay, high lighting efficiency, high color rendering index (CRI), steady light color, no glare, and improved visual health. An array of LED devices is directly put onto a substrate using COB (Chip on Board) technology. Compared to surface mount technology, chip-on-board technology allows for a far greater packing density. For the user, this results in increased consistency and intensity. Since light is emitted from a single, homogeneous surface as a result, it is possible to provide a natural lighting environment that is almost as bright as that produced by surface emission. Modern heat sinking and light dispersion technologies provide the best beam angles, the least amount of glare, and great target efficiency. There are many beam angle choices (30°, 60°, 90°, 100°, and 120°) to suit different applications depending on the floor’s light needs. For instance, the broad light distribution produced by the 100°/120°high bay lights covers a huge area of manufacturing or warehouse floors, reducing the number of luminaires required throughout the application. In aisles or corridors, however, the 30°, 60°, and 90° lights may be added to limit the beam angle for a more focused distribution.

A very effective heat management system further guarantees that the 50,000 hour life is feasible. For better heat dissipation, the cold-forged aluminum heat sink with anodized surface treatment increases the cooling area even further. The temperature decrease between the LED junction and the heat sink fins’ surface increases with heat sink size. To guarantee that a lower heat sink volume may be utilized, heat pipes and active cooling are used in a variety of designs to either boost convective cooling or decrease temperature drop. Superior constant current drivers with excellent efficiency not only guarantee product stability but also drastically reduce power consumption. The broad input voltage range of 100–277 V AC is accepted by these drivers. Dimming drivers provide just the right amount of light required for the work at hand, with adjustable light settings that maximize energy savings. The majority of LED bay lights are completely protected from dust and water jets by an IP65-rated polycarbonate glass. Usually, the high bay housing has a black powder coat finish to prevent corrosion and enhance heat transmission. Utilizing the high bay’s instant-on and instant-off features, occupancy sensors are used in some products to optimize energy efficiency and improve return on investment. Instant-on functionality is not available for other industrial lighting sources, such as metal halide (MH) lamps and high pressure sodium (HPS) lamps.