condition	mean	min	max
0 h after light	18.91235	18.6652	19.1595
4 h after light	13.5428	12.2164	14.8692
8 h after light	13.4865	12.5151	14.4579
4 h after dark	21.3185	20.4556	22.1814
8 h after dark	18.21115	16.0889	20.3334
12 h after dark	19.7165	19.0348	20.3982