This C4000/5K/LEDG2 corn cob-shaped LED light bulb from Feit Electric provides maximum illumination for large rooms, barns or anywhere you need more light. Each bulb comes with a mogul base adapter to easily upgrade HID non-ballast fixtures to LED. Energy-efficient LED technology puts out an ultrabright 4000 Lumens using just 35 W saving up to 88% in energy costs over equivalent 300 W incandescent. These bulbs have an average life of 35,000 hrs or 32 years, are ROHS compliant and 100% mercury free.