Amber reflector/clearance light is designed to surface-mount on 3" centers. Reflector lens with reflex eliminates the need for a separate reflector. Snap-on lens includes a replaceable 194 bulb. 1.375"L x 3"W x 5.625"H. Design eliminates need for separate reflector Snap-on lens with replaceable bulb | Optronics Rectangular Reflector/Clearance/Marker Light - twist-in socket; Amber