condition	mean	min	max
4 h after light	17.93685	16.8654	19.0083
8 h after light	13.7713	13.3083	14.2343
12 h after light	15.4746	14.2085	16.7407
4 h after dark	17.9708	17.4041	18.5375
8 h after dark	20.8847	19.7033	22.0661
12 h after dark	20.86515	20.4788	21.2515