Range of application:■ Widely used in petroleum mining, oil refining, chemical industry, military industry and other dangerous environment for general lighting and operational lighting; ■ It could work in Zone 1 and Zone 2 of explosive gas environment; ■ It could work in Zone 21 and Zone 22 of flammable dust environment; ■ It could work for T1-T6(T5) of temperature group; ■ It could work for energy saving renovation projects and maintenance & replacement for difficult places; ■ It could work for places with high protection requirements and poor wet environment.