Spot light, auxillary headlight with 55 watt H3 halogen bulb. Chrome body with stud mount. For those of you with adequate charging systems, these 55 watt halogen bulbs can throw a lot of additional light. Good for Ambassadors and Eldorados with Bosch generators or bikes with Nippon Denso alternators. For bikes with lessor charging systems such as Ducati or EME alternators, or for old Bosch alternators you'll need something with lower electrical demand.