This is Panasonic's "Twin Fluorescent Lamp Twin 2 (4-tube bridge) FDL18EX-L". Brightness/Power Consumption: 18W (Rated lamp power 18W) Color: Incandescent color (warm white) Base: GX10q-3 Rated Lifespan: 6,000 hours Features: Compact design with high brightness, tube diameter 16.7mm, length 127mm. An 18W U-shaped fluorescent lamp with a color temperature of 3000K, providing a warm light. - Brand: Panasonic - Model: FDL18EX-L - Type: Fluorescent lamp - Wattage: 18W - Color Temperature: 3000K - Shape: U-shaped Thank you for looking. I had this in storage as a spare, but no longer need it, so I am listing it for sale. Thank you in advance.