Thorn illuminates world’s longest sea bridge

Champion LED Pro and GTLED luminaires from Thorn have been chosen to light the new Hong Kong-Zhuhai-Macao Bridge – the world’s longest bridge across the sea.

The bridge is now nearing completion after nine years of construction work. It spans the Pearl River delta, connecting the islands of Hong Kong and Macau with the city of Zhuhai on the mainland; it has been a highly demanding construction environment, with frequent typhoons, airport height restrictions, high environmental standards and shipping to contend with.

Thorn secured two of the three lighting contracts associated with the CNY 115.9 billion project. Thorn’s products illuminate the two artificial islands at the east and west of the crossing, and the tunnel that leads to the bridge from Hong Kong.

Thorn was one of just three suppliers in the final round of bidding to light the artificial islands, and eventually won thanks to its ability to meet the extremely high construction standards and rigorous technical criteria.

Thorn provided has 120 Champion Pro LED 132 high-power floodlights, mounted on 12 high masts. These 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 1,000-hour salt-spray test, showing their ability to withstand the tough environment.

The fittings use 600W of power, compared to 1000W for conventional alternatives.

Meanwhile the Hong Kong team secured the tunnel lighting contract using 6,000 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.

Keith Ha, Product Manager of China State Mechanical & Electrical Engineering Limited 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.”

With three lanes in each direction, the 30km bridge – part of a crossing that totals 42km – will dramatically reduce driving time from Hong Kong to Zhuhai and Macau from around four hours to just 40 minutes.

The project is part of the Chinese government’s plan to develop the Guangdong-Hong Kong-Macau Greater Bay Area, which together forms Asia’s fifth largest economy.


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