condition	mean	min	max
4 h after light	6.5786299999999995	6.2950099999999996	6.898960000000001
8 h after light	6.600736666666667	6.419919999999999	6.70338
12 h after light	6.57975	6.2714	7.05824
4 h after dark	6.56065	6.38689	6.837269999999999
8 h after dark	6.58329	6.31609	6.838489999999999
12 h after dark	6.59301	6.52304	6.715339999999999