所有电气照明系统在其使用寿命内性能都会下降。光源工作时间越长，产生的光就越少，而其光谱输出可能会发生颜色变化。灯具表面的污垢和灰尘可能会影响光的输出和分布。组件会随着时间的推移而失效。为确保持续运行，业主采取措施保护其照明系统的功能，称为维护。维护良好的照明系统以可预测的方式运行，同时提供潜在的资金和运营成本节约。维护不善的照明系统可能会导致用户满意度、生产力、美学、销售、安全和安保方面的问题，以及持续获取预期节能的能力。本文件审查了常见的照明维护程序和有效的计划维护计划的核心组成部分。

All electric lighting systems degrade in performance during their operating life. Light sources produce less and less light the longer they operate, while their spectral output may shift in color. Light output and distribution may be affected by dirt and dust accumulation on luminaire surfaces. Components fail over time. To ensure continuing operations, owners take actions to preserve the functionality of their lighting systems, referred as maintenance. Well maintained lighting systems function in a predictable manner while offering the potential for capital and operating cost savings. Poorly maintained lighting systems can lead to problems with user satisfaction, productivity, aesthetics, sales, safety and security, and the ability to capture intended energy savings on an ongoing basis. This document examines common lighting maintenance procedures and the central components of an effective planned maintenance program.