condition	mean	min	max
4 h after light	7.4377325	7.207915	7.66755
8 h after light	7.205978	7.028205	7.383751
12 h after light	6.7344725	6.600438	6.868507
4 h after dark	6.961392	6.851723	7.071061
8 h after dark	7.2186075	7.189965	7.24725
12 h after dark	7.435193	7.435193	7.435193