LSE Lighting UV Bulb for use with R1500 R1700 models Brand: LSE Lighting - Length: 6 1/2" Bulb Type: J Type (U Shape) - Ultraviolet Germicidal UV - Base Type: 4pin Lamp Shape: J Type T6 Dual High Intensity This UV replacement lamp by (LSE Lighting) brand is 100% compatible for use with Purifier Models R1500 and R1700. All lamps listed are compatible brand (LSE Lighting) brand UV products.