condition	mean	min	max
4 h after light	6.425133333333333	6.29671	6.60053
8 h after light	6.33998	6.3165	6.37398
12 h after light	6.37938	6.24296	6.59138
4 h after dark	6.39602	6.28161	6.51357
8 h after dark	6.6079	6.54111	6.74075
12 h after dark	6.71716	6.59845	6.809880000000001