LED three-color alarm lights are essential signaling devices used in industrial and automation environments to indicate machine status, warnings, or emergencies. These lights feature high-brightness LEDs in red, yellow, and green, enabling clear visual communication across distances. Common variants include stack lights, rotating beacons, and modular towers, often with options for flashing patterns, sound alarms, and IP-rated durability. They are widely applied in production lines, warehouse systems, and equipment monitoring to enhance safety and operational efficiency.