CIE 234:2019旨在为城市夜景照明方面的目标和基本原则提供指导。它涉及城市规划这些方面的视觉、组织、环境和技术要素。本指南确定了在城市地区或新规划的城市中，当采取与新的或现有的照明相关的措施时，应考虑的照明规划标准。为照明的功能和表现方面提供指导。本出版物旨在支持需要启动、宣传和管理城市夜间形象的决策者，以及需要总体规划为长期照明发展提供良好基础的决策者。

The purpose of CIE 234:2019 is to provide guidance about the objectives and underlying principles relating to the lighting aspects of the urban nightscape. It deals with the visual, organizational, environmental, and technical elements of these aspects of urban planning.This guide identifies the lighting planning criteria that should be considered when initiatives are being taken in relation to new or existing lighting in urban areas or newly planned conurbations. Guidance is provided to both the functional and expressive aspects of lighting.This publication is intended to support those decision makers who are required to initiate, promote, and manage the night-time image of their city and who require a masterplan to provide a sound basis for long term lighting developments.