condition	mean	min	max
4 h after light	7.938888889	6.82	9.5
8 h after light	6.465	5.773333333	7.526666667
12 h after light	5.3100000000000005	4.19	7.286666667
1.5 h after dark	4.314444444333334	3.13	5.923333333
5.5 h after dark	5.184444444333334	2.173333333	7.26
9.5 h after dark	6.758888889	5.47	7.55