T3 Quartz Enclosed Replacement, should be replaced every 9000 hours or approximately every 12 months. If your strictly used for keeping coils clean on your HVAC unit, you can save money and the environment when you use your lamps for their maximum two-year life span Compatible Replacement for Ultravation & Solaris AS-IH-1001 Bulb , 12 T3 Lamp Assembly UV Replacement lamp (12 ) , Replaces AS-OH-1010 , ASOH1010 , ASIH1010 , ASIH1001 Found in the UltraMAX Models: UMX-1000T3, UMX-2000T3, UMX-1200T, UMX-1202T, UMX-1224T, UMX-12242T, UMX-2412-EZ, UMX-2412-EZ-M, UMX-12012-EZ, UMX-12012-EZ-M, UMX-24012-EZ, UMX-24012-EZ-M, SS-2412-EZ, UME-1000T3, UME-2000T3, UME-1200T, UME-1202T, UME-1224T, UME-12242T, UVS-1200T, UVS-1202T, UVS-1224T, UVS-12242T, UVE-1200T, UVE-1202T, UVE-1224T, UVE-12242T UV PhotoMAX Models: SS-PTS-1224-12R, SS-PTS-1200-12R UV Catalyst Models: UVCAT1224, UVCAT1224-12R Photronic Models: 92-005, 92-006, 92-074, 92-077, 92-080, 92-041, 92-042, 92-083, 92-086, 92-089, 92-092, 92-093, 92-095, 92-098, 92-099, 92-101, 92-104, 92-107 , 92-002, 92-003, 92-110, 92-044, 92-113, 92-025, 92-026, 92-116, 92-029, 92-119, 92-032, 92-033, 92-122, 92-035, 92-036, 92-125, 92-038, 92-128 , 92-008, 92-009, 92-131 , 92-011, 92-012, 92-134 , 92-014, 92-015, 92-137 , 92-017, 92-019, 92-020 , 92-139 ,92-046, 92-047, 92-048, 92-052, 92-053, 92-054, 92-058, 92-059, 92-060, 92-064 Item Weight 1 pounds Manufacturer Genuine Ultravation Item model number AS-IH-1001_v10