UL 924 Exit signs, after been exposed to 5 foot-candles of fluorescent light for 60 minutes are visible and legible in total darkness to observers from 50 feet away after all light has been extinguished.
Izimpawu ze-UL 924 zokuphuma, ngemuva kokudalulwa kwamakhandlela angama-5 ezinyawo zokukhanya kwe-fluorescent okwemizuzu engama-60 kuyabonakala futhi kuyaqondakala ebumnyameni ngokuphelele kubabukeli kusuka kumamitha angama-50 noma ayi-100 ngemuva kokukhishwa konke ukukhanya.