G36T5L/1P (1pin T5) 33 3/4" Long Ultraviolet UVC Germicidal UV Bulb 40W Single Pin Base (1 pin on each END) Model #G36T5L/1P High Quality & Long Life: This output at 253.7nm is highly effective to inactivate microorganisms such as bacteria,virus, yeast and mold Average Life Hours 12,000 Length: 33 1/2", Wattage: 40W