condition	mean	min	max
0 h after light	9.014185000000001	8.18847	9.8399
4 h after light	6.58106	6.15975	7.00237
8 h after light	7.0305800000000005	6.74759	7.31357
4 h after dark	7.07194	6.18703	7.95685
8 h after dark	8.34121	8.27323	8.40919
12 h after dark	8.380295	8.26689	8.4937