condition	mean	min	max
4 h after light	17.0165	16.3246	17.7084
8 h after light	8.81831	8.72489	8.91173
12 h after light	7.654165000000001	6.23309	9.07524
4 h after dark	6.738293333333333	6.3635	7.30074
8 h after dark	16.6549	16.62	16.7108
12 h after dark	13.988166666666666	13.4417	14.4842