Eiko 15501 - F4T5/D - 4 Watt Fluorescent Tube - T5 Linear Fluorescent Tube - 6500K - 700 Series Phosphors 4 Watts, G5 Base, T-5 Bulb 6.0"/152mm MOL, 0.63"/16mm MOD 2.75mg Mercury Content, Amalgam HG Form 115 Approx Initial Lumens, 92 Approx Mean Lumens CT deg K 6500, 6000 Rated Life