City Expressway

Beijing LIULIQIAO Bridge

【Customer Profile】 Liuliqiao is a major traffic hub situated on Beijing’s Third Ring Road, serving as a critical artery for the city's high-volume vehicular flow. 【Scope of Work】 The intersection's original lighting infrastructure consisted of nine 1000W high-pressure sodium (HPS) lamps mounted on six 35-meter high-mast poles. The facility required a comprehensive lighting upgrade to significantly reduce energy consumption and modernize the illumination quality while maintaining adequate visibility for nighttime traffic safety. 【The Solution】 The project executed a strategic retrofit, replacing the legacy HPS lamps with eighteen 200W LED floodlights utilizing a 2800K color temperature. This upgrade achieved a remarkable 66.67% energy-saving rate. The optimized system now delivers an average illuminance of 33 lx with a uniformity ratio of 0.56, maintaining a maximum illuminance of 68 lx and a minimum of 23 lx to ensure safe and consistent road visibility.

Результаты: The original nine 1000W high-pressure sodium (HPS) lamps have been replaced with eighteen 200W LED floodlights. The average illuminance is 33 lx, with a uniformity ratio of 0.56. The maximum illuminance is 68 lx, and the minimum is 23 lx. Using a 2800K color temperature, this upgrade achieves an energy-saving rate of 66.67%.