condition	mean	min	max
0 h after light	9.295335	8.97631	9.61436
4 h after light	14.7667	13.9281	15.6053
8 h after light	19.00475	18.6356	19.3739
4 h after dark	20.07705	18.1858	21.9683
8 h after dark	16.49465	16.4901	16.4992
12 h after dark	11.807	10.5159	13.0981