condition	mean	min	max
0 h after light	17.28365	16.535	18.0323
4 h after light	8.432215	8.19875	8.66568
8 h after light	7.42589	6.97269	7.87909
4 h after dark	23.37245	21.6006	25.1443
8 h after dark	20.7737	20.4825	21.0649
12 h after dark	16.78	15.9228	17.6372