noun
emergency exit sign; illuminated evacuation guide light
Refers to the illuminated signs that indicate emergency exits and evacuation routes in buildings.
避難誘導灯は停電時にも点灯するように設計されている。
Emergency exit signs are designed to stay lit even during a power outage.
Compound of 避難 (ひなん, 'evacuation') + 誘導 (ゆうどう, 'guidance') + 灯 (とう, 'light').