condition	mean	min	max
4 h after light	6.733656666666667	6.52355	7.15145
8 h after light	6.640696666666667	6.38364	6.85458
12 h after light	6.6969899999999996	6.43129	7.10836
4 h after dark	6.573160000000001	6.36881	6.800210000000001
8 h after dark	6.65972	6.39729	7.104080000000001
12 h after dark	6.600713333333333	6.3441	7.06332