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Thorn illuminates world’s longest sea bridge

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  • Lamp efficacy

    Lamp efficacy

    Ensuring the lamp efficiently converts electricity into light (lm/W).

  • Ballast classification

    Ballast classification

    Controlling the electricity supply to the lamp (Energy Efficiency Index).

  • Luminaire distribution

    Luminaire distribution

    Controlling light emission using optics which bend and shape the light to the correct location.

  • System efficacy

    System efficacy

    Combining optical and thermal control within the luminaire (luminaire lm/W).

  • Presence/absence detection

    Presence/absence detection

    Presence: Lights automatically turn on/off with movement. Absence: Lights automatically turn off and must be manually switched on.

  • Daylight detection

    Daylight detection

    Artificial lighting which responds to the natural light conditions.

  • Constant illuminance

    Constant illuminance

    A function designed to produce correct light levels for the duration of the maintenance period.

  • Task-scene setting

    Task-scene setting

    Allowing the user to set scenes and adapt the lighting to different tasks.

  • Timed off

    Timed off

    Automatic cut-off can be installed to turn all lights off during unoccupied hours.

  • Task lighting

    Task lighting

    Lighting task areas with the correct amount of light.

  • Zoning of lighting

    Zoning of lighting

    Lighting is zoned according to area use.

  • Maintenance schedule

    Maintenance schedule

    Maintenance must be performed in response to product age, performance and environment.

  • Waste light

    Waste light

    Eliminating waste light which does not hit the intended target.

  • Reflectance


    Taking advantage of light which is reflected from the surface within the space.

  • Visible smart metering

    Visible smart metering

    Results of actions can be quickly seen as increased or decreased energy use to encourage responsible energy consumption.

After nine years of work, the world’s longest sea-crossing bridge is nearing completion.

The Hong Kong-Zhuhai-Macao Bridge connects the islands of Hong Kong and Macao with the city of Zhuhai on the Chinese mainland. The 30km bridge will dramatically reduce driving time from Hong Kong to Zhuhai and Macao from about 4½ hours to just 40 minutes.

It’s a highly demanding construction environment, with frequent typhoons, airport height restrictions and shipping navigation to contend with. The cost of the bridge is estimated to exceed 115.9 billion yuan (€14.7 billion).

Products from Thorn light the two artificial islands at the east and west of the crossing, and the tunnel that leads to the bridge from Hong Kong.

We were one of just three suppliers in the final bidding round to light the artificial islands, winning thanks to our ability to meet the extremely tough requirements. We provided 120 Champion Pro LED 132 high-power floodlights, mounted on 12 high masts.

The Champion Pro LED fittings were chosen for their high efficacy of 115lm/W, long lifetime of 70,000 hours (L80), IP66 rating for ingress protection, and success in passing a 1000-hour salt-spray test.

We secured the tunnel lighting contract using 6000 of Thorn’s GTLED Entry and GT58 luminaires with DALI drivers to light a one-kilometre tunnel. These dedicated tunnel luminaires provide excellent lighting performance with high uniformity and long life.

Guo Wei, equipment manager of CCCC First Harbor Engineering Co, said: “It was vital that we find the right partner to work with us on this large-scale and prestigious project. We had stringent technical demands and a challenging environment to deal with, and we needed a supplier who could support us and work closely with us. Zumtobel Group and Thorn have done a great job.”

Keith Ha, Product Manager of China State Mechanical & Electrical Engineering, said: “We were delighted to work with Zumtobel Group and Thorn on the lighting for this major tunnel. They have fulfilled a challenging lighting brief and provided us with great products and great service. The results speak for themselves.”


Lighting Design:Mr. Quanke Su
Luminaires:Champion Pro 132 S45 and Champion Pro 132 S30
Ingress protection:IP66
Contract value:€114,000


Lighting DesignAtkins
Electrical EngineerChina State Mechanical & Electrical Engineering Limited
Lighting SolutionGT58 2X49W – Base (Tridonic DALI driver)
GTLED Entry – Boost (Osram Optotronic DALI driver)
Contract Value€1,389,000