Disclosed is a double-walled gasoline or fluid tank having a hollow space allowing light to be visible externally through a variety of openings or designs. A concave side portion of an existing tank is removed and a flat side wall, having an illumination device attached thereto, is attached where the original side portion was removed to create a new tank. An opening is created on the original side portion and the original side portion is reattached to the tank. The illumination device provides light through the opening in the original side portion. In an alternative embodiment a lighting device is provided underneath the gas tank to help illuminate the area in front and to the sides of the motorcycle. The lighting device is provided with a reflective surface area which reflects light received a light bulb in the direction in front of the motorcycle and to the side of the motorcycle corresponding to the side of the gasoline tank to which the motorcycle is attached.