condition	mean	min	max
4 h after light	7.72919	7.6626199999999995	7.80115
8 h after light	7.72034	7.70958	7.73181
12 h after light	7.708983333333333	7.48735	7.8371699999999995
4 h after dark	7.60325	7.549930000000001	7.63465
8 h after dark	7.631896666666667	7.59353	7.6514
12 h after dark	7.668203333333333	7.629919999999999	7.6875