Research on LED Optical System Design and Performance for Roadway Lighting on the Shenzhen-Zhongshan Bridge

WANG Yongheng; HE Guanghong; ZHANG Bangfeng

doi:10.3969/j.issn.1002-6150.2025.06.003

Abstract：This study addresses the non-universal lamp head issue of traditional LED streetlights in complex road section illumination applications for the Shenzhen-Zhongshan Link cross-sea bridge lane lighting,proposing a novel collaborative optimization design method integrating light sources and lenses.By innovatively combining lens design with light source arrangement,the streetlights'versatility and adaptability have been significantly enhanced while maintaining equivalent power consumption,enabling them to meet diverse illumination requirements in complex road conditions.The research team employed advanced computer simulation technologies for in-depth analysis:systematic simulation optimization of compound curved optical glass lenses was first conducted using LightTools software,followed by comprehensive evaluation of road lighting effects through the DIALux professional optical simulation platform.Based on these developments,a new LED streetlight was successfully developed and validated through physical prototype testing.Experimental results demonstrate the following superior performance characteristics of the novel LED streetlight:measured average luminance reaches 2.02～2.45 cd/m2,with overall uniformity of 0.47～0.85 and longitudinal uniformity of 0.85～0.89.The road surface illuminance achieves average values of 38～50 lx with overall uniformity ranging from 0.546 to 0.682.Glare restriction threshold increment remains within 4%～6%,while environmental ratios all exceed 0.67.Testing results confirm that the luminaire not only exhibits excellent luminous intensity distribution characteristics but also effectively suppresses glare phenomena.These metrics fully embody the core concept of energy conservation and emission reduction in modern road lighting design,achieving enhanced road surface illumination while significantly reducing resource consumption through a cost-effective design solution.