LSE Lighting replacement UV Bulb 40W for Aprilaire 1910 1930 90 87N77 1076R Bulb Type: Ultraviolet Germicidal UV UV-C Lamp Wattage: 40W, Base Type: 4pin (4pins on one END), Provides Air Disinfection Overall Length: 18" This UV replacement lamp by (LSE Lighting) is 100% compatible for use with Aprilare Air Cleaner Model 1910 1930 90 87N77 1076R. All lamps listed are compatible brand (LSE Lighting) UV products. We do not sell Aprilaire brand lamps. All Aprilaire brand names, trademarks and logos are property of Aprilaire.