25 Watt G25T8 , TUV25W , TUV 25W 3000008 - 18" UV, UV-C Germicidal Bi-Pin G13 Light Bulb G25T8 Effective Hours Rating: 10,000hrs - Ultraviolet Germicidal Light Bulb T8B Watts: 25 Length: 17.75 inches (450.85 mm) Number of Metal Pins: 4 (2 each side) Pin Pattern: Straight Line Length: approx: 18" Bulb Type: T5 Style Quartz Glass Eliminate microorganisms such as virus, bacteria, mold and yeast in the air and impurities in water