Abstract

Street lighting (SL) forms a major share of municipal energy consumption and should thus be energy efficient. However, question of how much energy can be saved on SL without compromising on the feeling of safety (FoS), which SL helps to provide for pedestrians, poses a major challenge. To tackle this challenge, in this study, we attempt to determine the amount of energy that can potentially be saved by a proper selection of SL attributes, such as light color and uniformity, while preserving FoS by pedestrians. As the study indicates, using warmer lights and increasing light uniformity can result in 30–50% energy savings on SL. Using this assessment, we estimate that for medium-size cities with population of 200–400 K residents, energy savings on SL can reach 8–23 MWh per annum, which is equal to the output of a small-to-medium-size power plant. As we conclude, the study findings help to design more efficient SL systems that can promote urban residents’ well-being, while saving energy and contributing to a cleaner and more sustainable urban environment. To the best of our knowledge, this study is the first that shows that energy on SL can be saved by using warmer lights and increasing light uniformity, while preserving a reasonable level of FoS.

Graphic abstract

中文翻译：

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在保持城市街道照明安全感的同时节省能源

摘要

街道照明（SL）在市政能耗中占主要份额，因此应该具有能源效率。然而，如何在SL上节省多少能量而不损害安全感（FoS）的问题提出了一个重大挑战，SL可以帮助行人。为了应对这一挑战，在这项研究中，我们试图确定可以潜在地SL属性，比如光色和均匀性的正确选择保存能量的量，而行人保护系统族。正如研究表明的那样，使用更暖的灯并提高光的均匀性可以节省SL的30％到50％的能量。使用此评估，我们估计，对于人口为200-400千的中型城市，SL的节能量每年可达到8-23 MWh，这相当于中小型电力的输出厂。综上所述，研究结果有助于设计更有效的SL系统，该系统可以促进城市居民的福祉，同时节省能源并为更清洁，更可持续的城市环境做出贡献。据我们所知，这项研究表明，SL的能量可以通过使用更暖的灯光和增加光的均匀性来节省，同时保持合理的FoS水平。

图形摘要