condition	mean	min	max
4 h after light	15.64045	13.3108	17.9701
8 h after light	18.34205	17.8468	18.8373
12 h after light	27.61365	26.146	29.0813
4 h after dark	21.139766666666667	20.894	21.3707
8 h after dark	20.0628	19.0881	21.1166
12 h after dark	15.773033333333334	14.9564	16.4164