LED indicator lights drove with AC/DC 110 VOLT. IP54 level can greatly prolong the life of the product. Industrial standard 22mm (7/8') mounting diameter. Low behind the panel depth (37mm) and come with a panel locking nut (Fits Panel Thickness: 6mm) The color of the LED and the dust cover are the same. So you can install indicator light fastly and save time in large project. Screw-clamp connection provides firm contact for reliable operation. Tested over 20,000 hours of using time, they will surely offer a steady performance Widely used in the ship, machine tools, machine equipment, switch cabinet and power distribution cabinet, electrical control panel such as HVAC Panel and electrical Panel, DIY Projects such as PLC Training Project.