This C4000/5K/LED corn cob-shaped LED light bulb from Feit Electric provides maximum illumination for large rooms, barns, or anywhere you need more light. LED technology puts out and ultrabright 4000 lumens using just 35 watts - saving up to 88% in energy costs over equivalent 300 watt incandescents. These bulbs have an average life of 35000 hours/32 years, are ROHS compliant, and are 100% Mercury-free.