... 3 years warranty for the products Longevity dome light,led dome light,xenon light. Rated Voltage220Vlight source:(on-polar fluorescent lamp) ... railway, iron and steel, shipping, army, aviation, police and fire-fighting, government and large-scale factory‘s fixed lighting need ... start and hot start .the factor of light source power>0.95 , high light efficiency, environmental,Energy-saving, no strobospic, ...