As these signs are intended for tunnels and roads, they are certified according to the EN12899 standard.
They have the highest optical classes:
L3 – brightness
U3 – uniformity of brightness
K – contrast between 5 and 15.
IP66 – protection against water and solids
IK10 – impact resistance
DSL4 – dynamic snow pressure
WL9 – load according to wind action
The main characteristics of these signs are:
The housing is made of aluminum or stainless steel, which provides resistance to all external influences.
Easily replaceable hardware parts.
One-sided and two-sided models.
Possibility to add emergency lights and flashers.
LED error detection and brightness adjustment.