Abstract: A vehicle illuminator is provided which acts as a conventional marker light, and additionally illuminates advertisements on the surface of a vehicle. To allow both functions to be performed by a single illuminator, at least one bulb, a reflector, and a transparent insert are combined with one or more conventional marker lights. Light from at least one additional bulb is reflected through a clear portion of a housing by the reflector, the reflector being positioned such that the reflected light illuminates a selected surface. Thus, the light, in addition to acting as a conventional marker light, illuminates advertisements on vehicle and trailer surfaces, making these advertisements more visible, especially during periods of low visibility.