There is no radiating fin on the shell. It has good radiating result; Screw thread is used in lamp body for fastening. 1,Can be used in hazardous environments of petroleum exploitation, smelting, chemical industry, military industry etc. enterprise;2,Can be used in Zone 1 and Zone 2 explosive atmosphere;3,Can be used in explosive atmosphere of temperature between T1 and T4 of class IIA and IIB.4, ...