Feit Electric’s 40-watt Cool White Non-Dimmable U-Bend Fluorescent Lamp replaces T12/U6 fluorescent tubes. This 2700-lumen u-shaped light in 4100K Cool White provides multi-purpose or task lighting for both living and workspaces. It is an ideal choice for offices, garages, workspaces, warehouses, and anywhere you need to get productive. Replace older, lumen-depreciated light bulbs with newer fluorescent light bulbs to maintain full brightness. F40CWX/U6 lights have an estimated energy cost of only $4.82 per year. Switch to Feit Electric linear lights for your space and get up to 18,000 hours of superior light. That's 16.4 years with 3 hours of daily use.