Technical Details Diameter Color Qty of LED Light Intensity Viewing angle Wavelength Power 400mm Red 138pcs ≥4000cd/m² 30° 625±5nm ≤5W Yellow 138pcs ≥4000cd/m² 30° 590±5nm ≤5W Green 138pcs ≥4000cd/m² 30° 505±2nm ≤5W Outside Material PC （UV resistant） Working Temperature -40℃～+80℃ Product on process About us FAQ 1: What are the basic components of an electric traffic signal light? The main components include signal light heads (red, yellow, green lights), controllers, timers, signal poles, basic power distribution equipment, and wiring. 2: How do electric traffic signal lights work? They work by connecting to the city power grid. The controller adjusts the light sequence and timing based on preset programs or real-time traffic conditions. 3: Can solar power supply meet the all-weather work requirements? Yes, the signal light is equipped with efficient solar cells and an energy storage system, allowing it to operate normally even on cloudy days.