condition	mean	min	max
4 h after light	7.719353333333333	7.6868300000000005	7.74273
8 h after light	7.819593333333334	7.72098	7.95574
12 h after light	8.09392	8.01004	8.19097
4 h after dark	8.14107	8.026489999999999	8.21551
8 h after dark	8.114363333333333	7.95246	8.23368
12 h after dark	8.228703333333334	8.16602	8.27397