Due to the complexity of urban subway network and long-time overload operation of underground lighting fixtures, LED underground light needs to meet stringent reliability requirements to ensure the safety travel of passengers. Such high demand mainly reflects in aspects of light illumination value, uniform illuminance value, color rendering index, quality characteristics, durability, protection, environmental protection, adaptability, maintainability and so on.
Fluorescent lamp, high pressure sodium lamp and metal halide lamp used to be the main lighting fixtures for subway tunnel lighting. However in recent years,LED lighting has been known and accepted by more and more clients and business. Today LED underground light has replaced traditional light and become the best choice for the subway lighting.