LSE Lighting compatible 40W UV Lamp for Aprilaire Model 1910 and 1930 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 and 1930. 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.