Replacement for 36W UV Bulb Lamp For Tetra Pond GreenFree UV3 36 Watt PL-L TUV Germicidal Ultraviolet (36 Watts) Replacement for 36W UV Bulb Lamp Tetra Pond GreenFree UV3 36 Watt PL-L TUV Germicidal Ultraviolet 100% Ozone Free Short-wave UV radiation with a peak at 253.7 nm (UVC) for disinfection purposes 2G11 4-pin Base / Length 16.15"inch Long Life 10,000 Hours Anyray AUVC-36W Germicidal Ultraviolet Light UV Bulb, LAMP Warning sign on lamp indicates that the lamp radiates UVC