JESCO Lighting SL4-L16/RD 16W T4 Fluorescent Lamp, Red. T4 Fluorescent Lamps. Average Life of 16,000 hours. Product Line: T4. Dimension: 18-7/8(L). Diameter: 1/2. Wattage: 16W. Lumens: 1000. Dimming: NO. Color Temperature: Red. Input Voltage: 120V.