condition	mean	min	max
4 h after light	13.57555	12.0602	15.0909
8 h after light	9.481785	9.11062	9.85295
12 h after light	14.21705	13.2689	15.1652
4 h after dark	23.41225	23.1953	23.6292
8 h after dark	26.59815	25.7332	27.4631
12 h after dark	24.9658	23.7337	26.1979