... left to right, right to left, up to down, down to up. The font and size of the ... 6. City illumination: building or bridge outline light, sculpture light ,square ground light, column illumination, etc.7. Traffic sign: ... bus, sign of bus stop, etc advantages of Led billboard:1. environment-friendly2. up to 80% energy ... for use8. safe9. low heat emitting CE ROHS LED open sign aluminium frame acrylic cover