condition	mean	min	max
4 h after light	6.425986666666667	6.35464	6.50972
8 h after light	6.298673333333333	6.2746	6.33772
12 h after light	6.17689	6.12258	6.20676
4 h after dark	6.264036666666667	6.2516099999999994	6.27979
8 h after dark	6.3362	6.28702	6.42408
12 h after dark	6.38666	6.22393	6.58197