I am having a hard time understanding to what lighting level should path of egress (corridors, parking garage isles, etc.) need to be lit to. In IBC section 1006.2 it states "not less than 1 footcandle) and in section 1006.4 "at least an average of 1 footcandle". NFPA 101, Life Safety Code has the same verbiage, 220.127.116.11 "at least 1 ft-candle" and 18.104.22.168 "an average of 1 ft-candle".
Which is it, a minimum or an average of 1 footcandle?