condition	mean	min	max
0 h after light	18.28785	17.1611	19.4146
4 h after light	15.899550000000001	14.7599	17.0392
8 h after light	10.485355	9.92671	11.044
4 h after dark	10.457325	8.74985	12.1648
8 h after dark	19.25865	17.2591	21.2582
12 h after dark	20.4009	19.285	21.5168