Product Detail Replacement Bulb for the following models - GG1000, GG1000CA, GGH200 Suggested that the bulb be replaced every 6-8 months depending on use 3.5-watts and eliminates over 98% of targeted airborne bacteria . The "Germ Guardian Pluggable Sanitizer Replacement Bulb LB1000" is best product for you. We recommended Germ Guardian Pluggable Sanitizer Replacement Bulb LB1000