在照明装置的使用寿命期间，由于表面污垢的积累和设备的老化，可用于该任务的光线逐渐减少。还原速率受设备选择、环境和操作条件的影响。在照明方案设计中，我们必须通过使用维护系数来考虑今年秋天，并计划适当的维护计划，以限制衰变。第4.8节中的照明标准“ISO 8995/CIE S 008-2001室内工作场所照明”建议最低维护系数。该条款规定，“照明方案的设计应根据选定的照明设备、空间环境和规定的维护计划计算整体维护系数”。高维护系数加上有效的维护计划促进了照明方案的节能设计，并限制了安装照明电源的要求。 本指南修订版描述了影响折旧过程的参数，并制定了估算室内电气照明系统维护系数的程序。它提供有关设备选择和经济维护周期估计的信息，并提供维修技术建议。它显示了一些数据示例，但对于准确的数据，它建议从制造商处获取数据。本指南取代CIE 97-1992《室内电气照明系统的维护》。它是用英语写的，有一个简短的法文和德文摘要，共34页，有13个图表和6个表格。

During the life of a lighting installation, the light available for the task progressively decreases due to accumulation of dirt on surface and aging of equipment. The rate of reduction is influenced by the equipment choice and the environmental and operating conditions. In lighting scheme design we must take account of this fall by the use of a maintenance factor and plan suitable maintenance schedules to limit the decay. Lighting standard "ISO 8995/CIE S 008-2001 Lighting of Indoor Workplaces" in Section 4.8, recommends a minimum maintenance factor. It states that "The lighting scheme should be designed with overall maintenance factor calculated for the selected lighting equipment, space environment and specified maintenance schedule". A high maintenance factor together with an effective maintenance programme promotes energy efficient design of lighting schemes and limits the installed lighting power requirements.This revision of the guide describes the parameters influencing the depreciation process and develops the procedure for estimating the maintenance factor for indoor electric lighting systems. It provides information on the selection of equipment and the estimation of economic maintenance cycles and gives advice on servicing techniques. It shows some examples of data but for accurate data it recommends that data should be obtained from the manufacturers.This guide replaces CIE 97-1992 "Maintenance of indoor electric lighting systems". It is written in English, with a short summary in French and German, consists of 34 pages with 13 figures and 6 tables.