1 Ex-mark:Exedmb IICT4/DIPA20TA,T6 2 Rated voltage: AC 220V 3 Ingress protection :IP66 BYS Series Explosion Proof Corrosion Resistance Polyester Fluorescent Fitting Application1 Designed for Explosive atmosphere Zone 1, Zone 2,Combustible dust Zone 20,Zone 21,Zone 22.2 Designed for Groups IIA,IIB,IIC. Temperature classes T1~T6/T43 Designed for petroleum exploitation, refinery, storage, chemistry, ...