1) Composed of super high brightness LED lamp 2) Low consumption and long lifetime 3) Control the brightness automatically, visual viewing distance: >500m 4) Handiness box frame, installed and connected simply and expediently 5) Electrical pressure: AC 220V, 50Hz 6) Electric consumption: A) Green arrow: 15W B) Red fork: 30W 7) Work temperature: -20 ~ +74C 8) Work humidity: <95% RH 9) LED traffic signal: With high brightness, high penetrating power and Showing observably 10) Much more virtue than traditional signals 11) Improves traffic crossing speed 12) Diameter: 8" (200mm), 12" (300mm), 16" (400mm)