Duro-Lite incandescent light bulbs last much longer than standard incandescent light bulbs with an average rated life of up to 6,000 hours. Designed for decorative applications, Duro-Lite light bulbs have a 2-year residential warranty. This 25-watt C15 Duro-Lite Sparkelite incandescent light bulb has a clear finish and a medium base. It is perfect for chandeliers and decorative fixtures.