Disclosed is a spa tub cover. The spa tub cover comprising one or more Ultraviolet (UV)-C lights integrated to an inner side of the spa tub cover such that the one or more Ultraviolet (UV)-C lights are arranged in an array configuration, and to be activated to disinfect water and/or surfaces within a spa tub; a hinge positioned between a first surface and a second surface of the spa tub cover to make the spa tub cover foldable; a switch mounted near the hinge of the spa tub cover, and to be operated for activating or deactivating the one or more Ultraviolet (UV)-C lights of the spa tub cover; and a power cord attached to the second surface of the spa tub cover for supplying power to the one or more Ultraviolet (UV)-C lights for sterilizing the water and/or within the spa tub.