Features: 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+15%, 50Hz+2Hz 6) Electric consumption: a) Green arrow: 15W b) Red fork: 30W 7) Work temperature: -20 - +748) 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)