The Harley light is designed to replace replace the 1157 lamp in older Harley Bikes that use the lens in the picture. The lamp uses 4 high brightness Red LED's for the Running and Brake function and a bright White LED for the Tag light. The light also contains a microprocessor which flashes the light when the brakes are applied. The lamps are designed to work on 12 Volt Negative Ground systems. LiteZupp lamps are guaranteed for 2 years from the purchase date against failure due to materials and workmanship.