... /VH Tube diameter:15mm BF-BF:1148mm Arc legth:1067mm quartz glass ,ozone type and ozone free type overage lifetime :9000hours ... used types of uv germicidal lamps following, for you tochoose:Instant Start Lamps,Preheat Start Lamps,Amalgam Lamps,High Output Lamps,Cold CathodeLamps,H-Lamps,Compact Lamps ETC. High ozone free ...