Tunnels

The tunnels are illuminated 24h per day and the input light is very important because drivers must enter in it without feeeling the difference of brightness "sun - black hole", but at night ?

At night, we must change the brightness of this entrance (even through the tunnel). Adding a dimmer at the head of the network will reduce this bright light. The dimmers are controlled and run by our control system with a permanent balance between indoor and outdoor lightings.

Principle