There is disclosed an enclosed space system through which vehicles may pass, the enclosed space system including interior surfaces, a photocatalytic coating on an interior surface of the enclosed space system, and a lighting system in attachment with an interior surface of the enclosed space system, the lighting system including light sources emitting wavelengths in the range between 340 nm and 450 nm, the lighting system arranged to illuminate the photocatalytic coating with the wavelengths in the range between 340 nm and 450 nm, wherein the photocatalytic coating is activatable by the wavelengths in the range between 340 nm and 450 nm. There is further disclosed use of light emitting diodes emitting wavelengths in the range between 340 nm and 450 nm to illuminate a surface coated with a photocatalytic coating, wherein the photocatalytic coating is activatable by the wavelengths in the range between 340 nm and 450 nm.
