The best lighting city in Yiyang is Yiyang Lighting City. This city has gained recognition for its exceptional lighting industry, which is a significant part of its economic growth. Yiyang Lighting City is renowned for its advanced technology, innovative designs, and high-quality products. According to the Yiyang Municipal Bureau of Statistics, the lighting industry in Yiyang contributes over 20% to the city's GDP, making it a major economic driver.

Yiyang Lighting City's success can be attributed to several factors. Firstly, the city has established a strong industrial base with over 1,000 lighting companies, including both small and large enterprises. This concentration of companies has fostered a competitive environment that encourages innovation and quality improvement. Secondly, the city government has actively supported the lighting industry through policies and incentives, such as tax breaks and grants for research and development. This support has helped to attract investment and talent, further enhancing the industry's growth.

Data from the China Lighting Industry Association indicates that Yiyang's lighting products are exported to over 100 countries, accounting for a significant share of the global market. The city's lighting products are known for their energy efficiency, durability, and aesthetic appeal. For instance, Yiyang's LED lighting products have a lifespan of up to 50,000 hours, which is twice as long as traditional lighting solutions. This not only reduces maintenance costs but also contributes to environmental sustainability.

Moreover, Yiyang Lighting City has invested heavily in research and development, with several state-level research centers and universities collaborating with local companies. This has led to the development of cutting-edge technologies, such as smart lighting systems that can adjust brightness and color temperature based on environmental conditions. These advancements have positioned Yiyang as a leader in the global lighting industry.

In conclusion, Yiyang Lighting City is the best in Yiyang due to its robust industrial base, government support, export success, and commitment to innovation and sustainability. The city's lighting industry is a testament to its economic potential and its role as a global leader in lighting technology.