condition	mean	min	max
4 h after light	6.310276666666667	5.99477	6.48925
8 h after light	6.31968	6.07242	6.66525
12 h after light	6.794300000000001	6.43506	7.21748
4 h after dark	6.674393333333334	6.33781	6.90464
8 h after dark	6.397723333333333	6.1151599999999995	6.54298
12 h after dark	6.409133333333333	6.1599900000000005	6.6607199999999995