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Optimal light distribution and glare reduction method for low guardrail lights
column:application cases Release time:2022-01-19

In the road fields such as urban viaducts, ramps, bridges, and overpasses, low-level lighting with continuous guardrails as the carrier is widely used. It is both decorative and functional, and at the same time due to the particularity of use, it must meet the requirements of aesthetics, reliable installation, and long service life.

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Taking the classic bridge lighting project of Guangdong Nansha Bridge (Humen Second Bridge) as an example, because of the complex terrain of the large turntable of the Seagull Island Interchange, it is necessary to consider both the bridge lighting effect and the vehicle guidance lighting effect in lighting planning. The LED anti-collision low-level guardrail lights put into use in this project fully consider the problems of traffic flow and safety index at night, and effectively prevent the impact of special environments, which are superior to lighting products at the same stage. After that, Shanghai Sansi, the lighting supplier for this project, continued to innovate and further completed light distribution optimization and glare suppression.

 

Nantong Garden Bridge, which connects the north and south of the Luyun Canal, the landscape bridge with double arch structure further dredges the traffic artery of Nantong city, optimizes and improves the function of the road network in the surrounding area, and plays an important role in the traffic flow in Nantong city. After the domestic lighting engineering expert Shanghai Sansi undertook this project, after field inspections and on the basis of ensuring the shape of the bridge’s double-arc straight cables, it customized a set of professional LED low-level lighting multi-functional street lamp guardrail system.

 

 

When participating in the planning of the system, according to human structure and driving habits, continuous comparison and demonstration were carried out, and the self-developed LED low-level guardrail system was selected, and the guardrail tubes on both sides of the bridge were fully used as lamp installation carriers to complete the road surface of the Garden Bridge. Lighting, together with adjusting the installation angle of the product during the test process, firstly, setting a reasonable installation height to prevent the driving vision of passing vehicles from being affected, and secondly, preventing strong light from irradiating the space outside the road surface to form secondary light pollution.

 

In addition to adopting the duckbill-shaped exterior design of the lamps and lanterns according to local conditions and reasonable installation height, it also provides professional optical customization solutions for the bridge to optimize light distribution and reduce glare. After the lamps are selected with customized light distribution, the beam control and visual comfort tend to be perfect. Its optical properties are as follows:

 

Separate light distribution on the left and right sides of the road to achieve directional and precise light distribution and soft light output, improving lighting uniformity;

 

The lens design meets the requirements of human vision, effectively controls the glare phenomenon of lights, and improves driving comfort and safety;

 

The side of the product is coated with yellow reflective film, which can reflect light at night to remind drivers, greatly improving driving safety;

 

Built-in imported light source chip, longer life, high lumen value, low light decay, and more stable overall performance.

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