FDDPZUM LB4000 Replacement Bulb 5W UV-C Bulb Compatible for Germ Guardian AC4300BPTCA AC4300BPT AC4825 AC4850 AC4850PT AC4900 AC4900CA AC4800 AC4900 CDAP4500 AC5300B AC5350B AC5350W

Wattage: 5W; Bulb Type: UV-C Ultraviolet; Base Type: G23 2pin UV bulbs compatible with GermGuardian AC4300BPTCA,AC4300BPT,AC4825,AC4850 AC4850PT,AC4900,AC4900CA,AC4800,AC4900,CDAP4500,AC5300B,AC5350B,AC5350W If the light begins to flicker or change color, it is time to replace the bulb. NoteThis is not a Germ Guardian product and is not covered under any Germ Guardian manufacturer's warranty.After-sale Service:If the product you receive is damaged, you can contact Amazon's customer service and ask for a return or replacement. They will help you solve the problem.