This pilot light, designed to last without maintenance for a bright indicator of process and machine operations, is easily installed into a standard 30.5mm diameter cut-outs and connected with simple screw-clamp connections. It is clearly distinguishable visually at a distance thanks to a bright and long-lasting 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.