Watt: 6W/10W/20W/25W Bulb Type: T5 base: G10q Wave Length: 254nm with or without ozone. This wave length has particular effect on nucleoalbumin, and causes variation or death of germs. Quartz glass can transmit more than 90% of the ultraviolet rays. With strong sterilization effect, the lamp can kill the bacteria and virus in the air and water. Applicable for water-disposal of big or small fishpond, water pool and air purification. Prevent direct exposure of body or eyes under these lamps. Customer design is cordially welcomed. CE approved.