1.Lamp Screen material:modified polycarbonate(PC) or acylic(PMMA) material features:strong resistance to ultraviolet radiation, antistatic,not yellowing, anti-ageing, and high-temperature tolerance the transparency of material reaches higher than 95%,uniform in illumination per principle of prismatic refraction and free from glare,with a range of irradiation two times or more than that of the traditional lamps. Holders and Decorated tops Material:HP die-cast aluminum material, with sureface of electrostatic plastic spray treatment features:high strength and strong weather tolerance Fittings: material:the decorated ring is in stainless steel material, and the surface is copperized or otherwise treated;the top cover is fabricated with aluminum pressing process, and surface is treated with static plastic spray features:strong anticorrosion, delicate surface, and anti-oxidation.