condition	mean	min	max
4 h after light	6.91522	6.7527	7.06743
8 h after light	7.02903	6.944030000000001	7.1100699999999994
12 h after light	7.114416666666667	7.0025	7.27032
4 h after dark	7.1072500000000005	7.01282	7.249810000000001
8 h after dark	6.851873333333334	6.77606	6.8955
12 h after dark	6.90346	6.892119999999999	6.91343