condition	mean	min	max
0 h after light	15.96415	15.8594	16.0689
4 h after light	7.135915	6.83723	7.4346
8 h after light	7.086175	6.62218	7.55017
4 h after dark	9.050735	8.40981	9.69166
8 h after dark	9.332525	9.10331	9.56174
12 h after dark	13.78375	11.4283	16.1392