condition	mean	min	max
4 h after light	6.256903333333334	6.12856	6.35705
8 h after light	6.536076666666667	6.389130000000001	6.632910000000001
12 h after light	6.31874	6.25934	6.41651
4 h after dark	6.5392866666666665	6.2484	6.68973
8 h after dark	6.54174	6.24469	6.8252
12 h after dark	6.076113333333334	5.863180000000001	6.1830099999999995