LSE Lighting LMPHGXJ105 UV Lamp Brand: LSE Lighting - Length: 10 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 Ultraviolet Purifier models LMPHGXJ105 R4000GX, R3500X, S300, L86-835, L87-287, L80-892. All lamps listed are compatible brand (LSE Lighting) brand UV products.