condition	mean	min	max
4 h after light	6.304493333333333	6.23407	6.35766
8 h after light	6.227523333333333	6.06081	6.325
12 h after light	6.16907	5.86292	6.33533
4 h after dark	6.342733333333333	6.18027	6.4786
8 h after dark	6.47673	6.1815	6.8875399999999996
12 h after dark	6.38904	6.37871	6.40477