LED光源的色温由其光谱决定，不同的光谱和色温会使人眼产生不同的视觉和非视觉响应，影响人眼的反应时间、视亮度、舒适度感受，从而对交通安全和照明节能产生影响。本项目针对当前隧道照明设计中急需解决的并受到广泛关注的光源色温选择问题，结合隧道各段照明的特点，重点研究LED光源光谱／色温对隧道各段照明的适用性。具体包括：在明视觉和中间视觉亮度范围内，研究LED光源色温对人眼反应时间、瞳孔大小、视觉对比度和舒适度的影响；研究LED色温对人眼明适应、暗适应的影响；研究LED色温对光源透雾性的影响；为隧道各段（入口段、过渡段、中间段、出口段）照明设计时LED光源色温的选择提供技术支持；为隧道照明规范中，隧道各段LED光源色温的使用和限定提出初步意见。

The correlated color temperature（CCT）of LED source is decided by its' spectrum. Because of different spectrum and CCT, human eye will have different visual and non-visual response, the reaction time and visual brightness and comfort will be different, traffic safety and illuminace energy conservation will be affected. In order to solve the CCT choice in the design of tunnel lighting, which need to be solven soon and have have been attracted much attention in recent years, on the base of the characteristics of tunnel zones lighting, application of LED light source spectrum / CCT on the lighting of tunnel zones will be studied in this project. Special contents include the effects of LED CCT on reaction time and pupil size and visual contrast and comfort under photopic vision and mesopic vision, the effects of LED CCT on dark adaption and light adaption of human eye, the effects of LED CCT on fog permeability of LED source. On the base of these studies, technical support will be provided to how to choose LED CCT in the design of tunnel zones lightings（threshold zone, transition zone, interior zone, exit zone） and priliminary opinions will be proposed to the usage and limitation of LED CCT in the tunnel lighting standard.