... 23W-85W 3, CE, ROHS certification 1, Induction anti-explosion lighting fixture , with high-frequency induction lamps . 2, Material : Die ... lifespan : 60000 hrs . 5, Working places : Hazardous: zone 1 and 2 . Explosive gas atmosphere : Class IIA, IIB, IIC . Hazardous: ... zone 20,21 and 22 Flammable dust atmosphere . Chemical industry , Army , Steel factory , ...