condition	mean	min	max
4 h after light	14.51605	13.7287	15.3034
8 h after light	13.491050000000001	13.1631	13.819
12 h after light	17.04415	16.7156	17.3727
4 h after dark	18.502049999999997	17.1055	19.8986
8 h after dark	20.1688	18.327	22.0106
12 h after dark	18.419	17.2192	19.6188