The five articles in the current issue illustrate the broad range of topics associated with outdoor lighting – sky glow, road surface reflectance, road safety and visual performance. They describe the findings of new research so that other researchers can learn of the advance, can criticise, and can plan new hypotheses: gradually, the knowledge base improves.

中文翻译：

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社论：谁需要知道？

本期的五篇文章阐述了与室外照明相关的广泛主题-天光，路面反射率，道路安全和视觉性能。他们描述了新研究的发现，以便其他研究人员可以了解新的进展，可以批评并可以计划新的假设：逐渐地，知识库得以改善。