IEC 60598-2-22:20 21作为IEC 60598-2-22:20 21 RLV提供，其中包含国际标准及其红线版本，显示了与上一版本相比技术内容的所有变化。IEC 60598-2-22:20 21规定了与不超过1 000 V的应急电源上的电灯一起使用的应急灯具的要求。本第五版取消并取代了2014年发布的第四版和修正案1:20 17。本版构成技术修订版。与上一版相比，此版本包括以下重大技术变更: -更新休息模式和抑制模式的要求； -高温操作试验的澄清； -锂电池新要求出台； -引入对双电层电容器(EDLC)的新要求；-明确耐热、防火和跟踪； -澄清独立灯具的测试设施； -澄清出口标志对比度测量的测试方法。

IEC 60598-2-22:2021 is available as IEC 60598-2-22:2021 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.

IEC 60598-2-22:2021 specifies requirements for emergency luminaires for use with electrical lamps on emergency power supplies not exceeding 1 000 V. This fifth edition cancels and replaces the fourth edition published in 2014 and Amendment 1:2017. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- update of requirements for rest mode and inhibiting mode;
- clarification of high temperature operation tests;
- introduction of new requirements for lithium batteries;
- introduction of new requirements for electric double layer capacitors (EDLCs);
- clarification of resistance to heat, fire and tracking;
- clarification of test facilities for self-contained luminaires;
- clarification of the test method for contrast measurements of exit signs.