condition	mean	min	max
4 h after light	6.981203333333333	6.8380399999999995	7.1024
8 h after light	6.95966	6.688280000000001	7.106560000000001
12 h after light	6.943033333333333	6.3971	7.22946
4 h after dark	7.134556666666667	7.06002	7.26853
8 h after dark	7.009329999999999	6.65417	7.18805
12 h after dark	7.068606666666667	6.790839999999999	7.22818