LSE Lighting compatible #20 UV Bulb for Pura UVBB UVBB-01 UVBB-02 UVBB-03 Base Type: 4 Pin Base T5 (4 pins on ONE END) Compatible UV Replacement Bulb by (Light Spectrum Enterprises, Inc Brand) - fits these models UVBB-01 UVBB-02 UVBB-03 Effective Hours Rating: 12,000hrs - Ultraviolet Germicidal Light Bulb Watts: 22W Bulb Type: T5 Style Quartz Glass