Led Number: 1 or 2 Led (Uni-directional), 2 or 4 Led (Bi-directional) – 5mm. Led Color: Amber, Red, White, Blue, Green. Led Configuration: Uni and bi-directional with the possibility of using different Led colors in the same unit. Mechanical. Projection: 12,7mm above ground. Minimum Installation Depth: 50 mm.