condition	mean	min	max
0 h after light	19.305	19.216	19.394
4 h after light	8.865585	7.21077	10.5204
8 h after light	7.62805	7.51939	7.73671
4 h after dark	19.13335	13.0981	25.1686
8 h after dark	25.53585	23.8686	27.2031
12 h after dark	20.28725	17.2312	23.3433