The AD22 series signal indicator lights all use LED light-emitting chips as the light source, with long lifespan, low energy consumption, small size, and light weight. It is an updated product of various types of incandescent and neon signal indicator lights. The lampshade is made of high-strength polycarbonate, which has good impact resistance. It is equipped with screw compression wiring, which is safer and more convenient. This series of signal indicator lights is suitable for signal indication, warning signal, accident signal, and other indicating signal lights in the circuits of power, telecommunications, machine tools, ships, textiles, printing, mining machinery and other equipment.