Feit Electric’s 30-watt Cool White Non-Dimmable Fluorescent Linear Tubes replace F30T12 or T12 fluorescent tubes. This 1900-lumen light in 4100K Cool White provides clean, mid-range light for both living and workspaces. Use it for multi-purpose lighting or task lighting. An ideal choice for offices, garages, workspaces, warehouses, and more. Replace older, lumen depreciated light bulbs with newer fluorescent light bulbs to maintain full brightness. F30T12/CW/RS/2 lights have an estimated energy cost of only $3.61 per year. Switch to Feit Electric linear lights for your space and get up to 10,000 hours of superior light. That's 9.1 years with 3 hours of daily use.