condition	mean	min	max
4 h after light	7.582820000000001	7.46472	7.681960000000001
8 h after light	7.500963333333333	7.37442	7.60342
12 h after light	7.4634833333333335	7.44636	7.474060000000001
4 h after dark	7.19926	7.14637	7.23066
8 h after dark	7.4530666666666665	7.25585	7.682689999999999
12 h after dark	7.438456666666666	7.401089999999999	7.5121199999999995