condition	mean	min	max
0 h after light	19.78035	19.1976	20.3631
4 h after light	16.2821	15.4484	17.1158
8 h after light	16.011	15.6413	16.3807
4 h after dark	19.52025	17.7454	21.2951
8 h after dark	16.8279	15.5706	18.0852
12 h after dark	18.27655	17.0994	19.4537