Replacement for 13 Watt PL-S Germicidal UV Bulb G23 Base 13W JBJ Coralife Ultraviolet Light Bulb 13W (13 Watts One molded snap G23) Replacement for 13 Watt PL-S Germicidal UV Bulb G23 Base 13W JBJ Coralife 13W Anyray AUVC-13W1 100% Ozone Free Short-wave UV radiation with a peak at 253.7 nm (UVC) for disinfection purposes G23 2-pin Base Long Life 10,000 Hours Germicidal Ultraviolet Light UV Bulb, LAMP Warning sign on lamp indicates that the lamp radiates UVC