Specialized composite warning spheres are used to increase the visibility of transmission lines for aircraft, thereby completely eliminating potential accident risks. In the illumination of power transmission lines, the fundamental criterion is to reduce the risk of flight accidents that occur under adverse weather conditions. In particular, after nightfall the visibility of transmission lines decreases markedly and, in some areas, seeing them becomes nearly impossible. For this reason, specialized composite warning spheres are designed to ensure flight safety in dusty, foggy, cloudy, rainy, and windy conditions, and to render power transmission lines visible after dark by providing illumination.