In LED lighting lamps, bottom lamps, chandeliers, projection lamps and other decorative and reflective LED lighting lamps can be fully qualified for any occasion, including art galleries, museums and other places with high color requirements. However, for large-scale facilities such as shopping malls and office buildings, LED lamps as large-scale lighting have been born, but their directivity ( The light emitted by the LED chip is straight and the divergence is not good) It is too high, which makes it difficult to design the average illuminance in a large area. The arrangement of lamp-type LED lighting lamps is too dense, the design cost is too high, and the energy-saving effect is lost. Therefore, at this stage of decorative applications, LED lighting fixtures are fully available, and large-area indoor lighting is still immature.