建筑设计防火规范(GB50016—2014) 第10.3.4条

疏散照明灯具应设置在出口的顶部、墙面的上部或顶棚上；备用照明灯具应设置在墙面的上部或顶棚上。

Code of Design on Building Fire Protection and Prevention (GB50016-2014), Article 10.3.4

Evacuation lighting fixtures should be installed at the top of the exit, on the upper part of the wall, or on the ceiling; Backup lighting fixtures should be installed on the upper part of the wall or ceiling.