Twilight sensor for Heliports.

Twilight dimming controller, ref. AES-111-AX. It has a double twilight sensor.
· Works together with a heliport controller:
· When the light intensity is less than 100lx the controller will change the brightness to 10%.
· When the light intensity is between 100 and 800lx the controller will change the brightness to 30%.
· When the light intensity is more than 900lx the controller will change the brightness to 100%.