condition	mean	min	max
0 h after light	15.70665	14.9723	16.441
4 h after light	16.4294	12.2418	20.617
8 h after light	17.41495	17.0862	17.7437
4 h after dark	20.2083	19.6409	20.7757
8 h after dark	19.3202	17.1272	21.5132
12 h after dark	16.61245	13.4773	19.7476