condition	mean	min	max
4 h after light	6.47023	6.3726400000000005	6.60228
8 h after light	6.286326666666667	6.174919999999999	6.417330000000001
12 h after light	6.43912	6.2615	6.71992
4 h after dark	6.452066666666666	6.26964	6.6066899999999995
8 h after dark	6.3159	6.266290000000001	6.34186
12 h after dark	6.401203333333333	6.18133	6.6163