condition	mean	min	max
4 h after light	16.44915	14.8201	18.0782
8 h after light	11.9006	11.8276	11.9736
12 h after light	12.24775	11.7231	12.7724
4 h after dark	14.074	12.9349	14.8858
8 h after dark	18.124033333333333	17.2483	18.7287
12 h after dark	18.5102	17.9145	18.8384