This pilot light, designed to last without maintenance for a bright indication of process and machine operations, is easily installed into standard 22 mm Dia cutouts and connected with simple screw clamp connections. It is clearly distinguishable visually at a distance thanks to a bright and long-lasting LED illumination. It is impact-resistant, dust-resistant, water-resistant and vibration-resistant thanks to its IP66/IP67/IP69/IP69K, making it ideal for operation in harsh environments.