LSE Lighting compatible UV bulb 16W for Siemens LP4105 Purifier Brand: LSE Lighting - Professional Ultraviolet Lighting Company Base Type: 4 Pin Base T5 (4 pins on ONE END) - Length: 14" (357mm) Compatible UV Replacement Bulb by (Light Spectrum Enterprises, Inc Brand) Watts: 16W; Effective Hours Rating: 12,000hrs - Ultraviolet Germicidal Light Bulb Bulb Type: T5 Style Quartz Glass - Light Spectrum Enterprises, Inc Replacement UV Bulb is 100% compatible with Siemens LP4105 water sterilizers and purifiers.