Abstract: An illuminating helmet cover configured to connect with a helmet, such as a motorcycle helmet, bicycle helmet, construction helmet, or the like. The illuminating helmet cover includes a plurality of illuminating elements, such as light-emitting diodes, lamps, or reflective surfaces, which allow a user to be more easily visible. The plurality of illuminating elements are coupled with one or more strands that are configured to extend over the helmet, such as in the form of a netting. The illuminating helmet cover fastens with the helmet via one or more coupling components, such as clamps, hooks, adhesives, Velcro, etc. A power source is connected with the one or more strands for providing power to one or more of the plurality of illuminating elements. Operation of the plurality of lights may he customized by the user, for example, by changing colors, strobe patterns, and/or brightness or intensity.