Replacement UV Bulb Lamp for ActivTek InDuct 750 HVAC system 5" 4pin Compatible Bulb For Use with: ActivTek Induct 750 System HVAC Length: 5" SuperLIFE: 12,000 Hours - BRAND: LSE Lighting Lamp Shape: T5 - Glass: Clear Quartz Glass All lamps listed are compatible brand (LSE Lighting) UV products. We do not sell ActivTek brand lamps. All ActivTek brand names, trademarks and logos are property ActivTek.