condition	mean	min	max
4 h after light	16.33695	14.7809	17.893
8 h after light	14.1995	12.8309	15.5681
12 h after light	15.208200000000001	15.1324	15.284
4 h after dark	18.825000000000003	18.091	19.559
8 h after dark	19.42585	18.2876	20.5641
12 h after dark	17.50675	17.4171	17.5964