An illuminating decorative device comprising a plurality of electrically conducting wires interconnected together as a lattice or web including a plurality of lights that are electrically coupled to an electrical power strip having one or more connectors for connecting to an external power source, where the illuminating decorative device is configured into various ornamental shapes or patterns including for example, snowcaps, or a spider web. The illuminating decorative device is easily and quickly attachable to buildings and other surfaces such as rooftops as one integral unit to provide decorative illumination during holiday seasons or festive occasions or celebrations.