Brand: LSE Lighting® Bulb Type: Ultraviolet Germicidal UV for Water Purification Systems Base Type: Single Ended Bi-Pin Winged Base - Wattage: 41W - Length: 33" This UV replacement lamp by (LSE Lighting) brand is 100% compatible for use Aquafine CSL & RBE Series (CSL/RBE-4R, CSL/RBE-6R, CSL/RBE-12R, CSL/RBE-24R) Steriliziers. All lamps listed are compatible brand (LSE Lighting) UV products. We do not sell Aquafine brand lamps. All Aquafine brand names, trademarks and logos are property of Aquafine respectfully. Warning: Ultraviolet Germicidal UVC light is harmful and dangerous to your eyes and skin. Please Use safety gear during installation.