High bay lights are used for global illumination, and the suspension is high. The light source adopts metal halide lamps, energy-saving lamps, LEDs, induction lamps and other high-color light sources. According to different places, there should be anti-corrosion, dust-proof, water-sprinkling and explosion-proof functions, and attention should be paid to the heat dissipation of lamps and lanterns, especially LEDs. Traditional high bay lights have a huge waste of energy due to the shortcomings of large light loss. Therefore, the development of new high-efficiency, energy-saving, long-life, high color rendering index, and environmentally friendly LED high bay lights is of great significance to energy saving in industrial lighting.