condition	mean	min	max
4 h after light	18.0034	17.0173	18.9895
8 h after light	7.883330000000001	7.0849	8.68176
12 h after light	7.575239999999999	7.07825	8.07223
4 h after dark	11.8014	11.4572	12.2488
8 h after dark	16.2148	14.0396	20.1853
12 h after dark	17.5051	15.9194	18.7275