condition	mean	min	max
4 h after light	18.4312435	18.243605	18.618882
8 h after light	15.1203695	13.880185	16.360554
12 h after light	14.788260000000001	13.877265	15.699255
4 h after dark	17.3597095	15.015598	19.703821
8 h after dark	19.235856	18.567356	19.904356
12 h after dark	16.46865	16.46865	16.46865