SENKEN is first brand in producing the electric equipment,lightbar.siren in China. Safe and Explosion- ... and explosive places such as oil field, metallurgy, railway, electric power, police, petrochemical etcs IIA, IIB, IIC sort, ... normal functioning in rainstorm. Light source: Using the latest light source, imported 1WLED, high light efficiency, long life, light color uniformity, standard parabolic ...