城市和行人区道路照明设计主要考虑行人的需求，而不是司机的需求。本报告总结了最近关于灯具光谱对行人重要任务影响的研究。这些任务包括检测路面障碍物、个人间判断（如面部识别）和亮度判断。对于行人来说，亮度很重要，因为更明亮的照明往往会在特定位置产生更高水平的安全感。已经发现，在中间区域，与S/P较低的灯相比，具有较高暗/明（S/P）比的灯显得更亮，并且允许更好地检测周围障碍物- 相同照度下的比率。这意味着，具有高S/P比的灯具可以在相同的照度下使用，以产生更高的亮度并更好地检测周边障碍物，或者在较低的照度下使用，但具有相同的亮度和障碍物检测能力，后者可以降低能耗。CIE推荐的中光光度测量系统可用于预测不同光谱灯下的亮度和周边障碍物检测。进一步的视觉需求包括面部识别和环境外观是可接受的。 光谱如何影响识别他人身份的能力尚不确定，但有人认为，颜色信息可能会带来好处。至于环境外观的可接受性，这与光源的显色性有关。对于这些视觉需求，除了S/P比之外，色彩渲染也很重要，但没有足够的数据来充分描述效果。鉴于这些发现，当使用不同的光源时，可以修改住宅道路中使用的照度。 这些照度应根据光源的两个特性选择，即S/P比和显色指数（CRI）。该报告包括英国（UK）的新指南，其中，当使用CIE通用显色指数大于或等于60的灯具时，可以考虑从S系列照明等级中建议的水平降低照度；使用CIE推荐的介孔光度法系统计算减少量。英国指南假设低压钠照明是S的参考- 一系列的照明课程。其他选择遵循英国采用的系统的国家可以修改该方法，以考虑不同的基准照明。例如，如果使用高压钠放大器（在欧洲广泛使用）作为基准，允许的照度降低将小于英国允许的照度降低。在选择最合适的照明时，除了灯光光谱对视觉的影响外，可能还需要考虑其他因素。报告的最后一节讨论了这些问题，包括照明对自然环境的影响、眩光以及随着年龄的增长眼睛变化的影响。 对于老年人而言，为中眼点区域（即更高的S/P比）优化使用的灯具所提供的视觉效果的增加可能低于其他人群，并且此类灯具可能会增加这些老年观察者的不适眩光效果。一般来说，在街道照明应用中使用“白光”是有益的，前提是这些其他因素也被考虑在内，并且不会受到显著影响（例如，如果眩光没有显著增加）。 该出版物以英文写成，并附有法文和德文的简短摘要。

Lighting design for roads in urban and pedestrian areas considers primarily the needs of pedestrians rather than drivers. This report presents a summary of recent research on the implications of lamp spectrum for those tasks considered to be important for pedestrians. These tasks include detection of pavement obstacles, inter-personal judgements such as facial recognition, and judgement of brightness. For pedestrians, brightness is important because brighter lighting tends to produce higher levels of perceived safety in a particular location.It has been found that in the mesopic region lamps with a higher scotopic/photopic (S/P) ratio appear brighter, and permit better detection of peripheral obstacles, than do lamps with lower S/P-ratios at the same illuminance. This means that lamps with a high S/P-ratio can be used either at the same illuminance to create a higher brightness and better detection of peripheral obstacles or at a lower illuminance but the same brightness and obstacle detection ability, the latter leading to a reduction in energy consumption. The CIE recommended system of mesopic photometry can be used to predict brightness and peripheral obstacle detection under lamps having different spectra.Further visual needs include facial recognition and that the appearance of the environment is acceptable. How light spectrum affects the ability to recognize the identity of other people is still uncertain, but there is a suggestion that chromatic information can be of benefit. As for the acceptability of the appearance of the environment, this is more consistently related to the colour rendering of the light source. For these visual needs colour rendering is important in addition to the S/P-ratio, but there are insufficient data with which to fully characterize the effects.Given these findings it is possible to modify the illuminances used in residential roads when using different light sources. These illuminances should be chosen based on two characteristics of the light source, S/P-ratio and colour rendering index (CRI). The report includes new guidance in the United Kingdom (UK) in which a reduction in the illuminance from the levels recommended in the S-series of lighting classes can be considered when using lamps which have a CIE general colour rendering index greater than or equal to 60; the reduction is calculated using the CIE recommended system of mesopic photometry. The UK guidance assumes that low pressure sodium lighting is the reference for the S-series of lighting classes. Other countries that choose to follow the system adopted in the UK can modify the approach to take account of different benchmark lighting. For example, if the high pressure sodiumlamp (which is in widespread use in Europe) is used as the benchmark, the allowed reduction in illuminance will be less than that allowed in the UK.Other factors, in addition to the influence of lamp spectrum on vision, may also need to be considered when selecting the most appropriate lighting. These are discussed in the final section of the report, and include effects of lighting on the natural environment, glare, and the impact of changes in the eye that occur with age. The increase in visual effectiveness offered by lamps optimized for use in the mesopic region (i.e. higher S/P ratio) may be lower for older persons than for the rest of the population, and such lamps may lead to increased discomfort glare effects for these older observers. In general, the use of 'white' light in street lighting applications is beneficial, provided that these other factors are also taken into account and are not significantly impacted (e.g. provided glare is not significantly increased). The publication is written in English, with a short summary in French and German.