Geoga Bridge, South Korea

The Opportunity

Formally known as the Busan-Geoje Fixed Link, Geoga Bridge is a 5.1-mile bridge and tunnel system connecting the city of Busan with nearby Geoje Island. The link begins with two cable-stayed bridges, each over a mile long, spanning Geoje Island and two smaller islands. The route continues for two more miles underwater in one of the world’s deepest immersed roadways, which emerges onto the mainland just Southwest of Busan.

Maintained by Korea Infrastructure Management Corporation (KOINFRA), the bridges are brilliantly lit to highlight the architecture and increase safety. In order to enhance the existing lighting display while saving on energy costs, KOINFRA decided to upgrade the architectural lighting at Geoga Bridge with powerful, compact and energy-efficient LED lighting fixtures.

The Solution

Hansam System Co., Ltd. replaced the Geoga Bridge’s conventional Martin lighting fixtures with cutting-edge Martin Exterior Wash 300 LED fixtures. The Martin Exterior Wash 300 delivers sufficient brightness to match the older traditional lamps’ output, while drastically reducing power consumption and operation costs with a high-efficiency LED design. Powerful, single-color RGBW LEDs deliver up to 10,300 lumens at full white and blend seamlessly for rich, smooth hues. Of the six beam angle options available, Hansam utilized the narrow diffusion option to highlight the architectural elements with striking illumination. Martin RDM5.5 Splitters carry DMX and RDM lighting control signals between fixtures, maintaining a stable connection over the bridge’s long spans.

The Exterior Wash 300 is IP66-rated for permanent outdoor use, enabling it to withstand the harsh conditions on the bridge. As an extra safety measure against the punishing 134 mile-per-hour winds experienced in the area, Hansam secured the fixtures using reinforced base plates in addition to their built-in mounting brackets. The Exterior Wash 300’s optional glare shield snoot attachment reduces light spill and focuses the illumination on the bridge.

The Impact

“KOINFRA asked us to do the design and simulation of the new bridge lighting,” said Mr. Dongjin Jim, Sales Manager at Hansam System Co., Ltd. “The bridge had older Martin Exterior 600 lamps, and the client wanted an LED replacement with equal brightness. After evaluating their requirements, we decided to use Martin Exterior Wash 300 fixtures in order to provide the necessary brightness and withstand environmental forces.”

“We were highly satisfied with the previous Martin Exterior 600 fixtures, and the maintenance service from Hansam System Co.,” said Mr. Yangil Kim, Manager at KOINFRA. “That’s why we decided to continue our venture with Hansam, and since the team was confident about the quality and performance of the Exterior Wash 300, we decided to lock it in the project. The color output of the fixture is commendable.”



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