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Best Practice

City of Nørreport

Awarded LED outdoor lighting:Train station Nørreport in Copenhagen, Denmark

The new lighting system

The lighting system consists of four elements:

1. Up-lighting under the white roofs that cover station stairs, travel centre, toilets and bicycle parking. Colour temperature 3000 K, luminance 2-10 cd/m2.

2. Light lines installed along the glass facades of the buildings under the roofs.

3. Light columns (actually ventilation installations) providing cool light fading out toward the top, almost connecting the square to the moon light. The columns are fitted with curved glass covering an aluminum reflector, type Skybright. The reflector is grazing lit from below by LEDs in curved rows, 1260 diodes per column. Colour temperature 4000K. Luminance 15 – 50 cd/m2, lowest at the top.

4. Bicycle stands with LEDs at the top. Stands under the white roofs are fitted with up-lights, 3 x 1W, 120o. Bicycle stands in the open are fitted with autonomous, solar powered LEDs.

The existing wire suspended general lighting has not been changed to LED. It provides a luminance of 1-2 cd/m2. The colour rendering is 85-90 Ra. The red neon sign from the 1930ies was preserved as an iconic Copenhagen landmark.

DMX light controlled, based on daylight levels provide gradually increased lighting as the daylight disappears. All luminaires fade in gently. The lighting is dimmed in the middle of the night.

Results

The client required that the total power consumption should be below 12.5 kW, which was the effect of the old lighting system. The DMX control system enables this.

Lessons learned

A creative LED lighting design can create a public square with:

  • Good connection to the surrounding streets
  • Intuitive wayfinding
  • A pleasant and safe night time environment
  • Strong character and identity

Short description of the technical lighting system

  • The lighting is dimmed in the middle of the night
  • All luminaires fade in gently
  • DMX controlled, based on daylight levels provide gradually increased lighting as the daylight disappears
  • At 1000 lux the light-line is switched on
  • At 500 lux the up-light under the roofs are switched on
  • At 300 lux the up-light at the cycle stands under the roofs are switched on
  • At 200 lux the light in the columns are switched on
  • The colour rendering is 85-90 Ra