condition	mean	min	max
4 h after light	6.85728	6.7542100000000005	6.94946
8 h after light	6.899016666666667	6.82154	7.00675
12 h after light	6.80105	6.7742	6.8329
4 h after dark	6.945563333333333	6.73925	7.17165
8 h after dark	6.692983333333333	6.6532800000000005	6.76265
12 h after dark	6.74207	6.6907	6.79938