condition	mean	min	max
4 h after light	17.86065	16.7618	18.9595
8 h after light	15.901900000000001	15.4673	16.3365
12 h after light	15.84545	14.893	16.7979
4 h after dark	17.650233333333333	17.417	17.8962
8 h after dark	18.8676	18.3099	19.4237
12 h after dark	17.406333333333333	16.1919	18.0948