Ultraviolet Germicidal lamp is made of professional high-purity quartz sand and standard model transparent quartz glass tube produced by automatic control continuous melting equipment. It has high purity, good thermal stability, high transmittance (UVT), (vacuum dehydrogenation) and low hydroxyl content. There are high ozone lamps made of transparent pure quartz glass tubes emitting 185nm and 254nm, and ozone free lamps made of quartz glass tubes shielding 185nm radiation and high transmittance 254nm.