Which laser colour for which floor surface?

The right colour depends on the surface and the application. Green (520 nm) is the brightest option and the best choice on nearly all surfaces – the standard for walking and driving paths. Red (638 nm) conventionally signals danger and stop – ideal for forklift-proof stop lines, danger zones and safety distances in industrial halls. Blue (450 nm) stands out particularly well on light or yellowish floors, less so on grey concrete. Light blue (465 nm) delivers high contrast for special markings such as clean-room boundaries or inspection areas. On wooden floors or natural stone blue often provides the best contrast.