condition	mean	min	max
4 h after light	16.712	15.4896	17.9344
8 h after light	13.8003	12.3611	15.2395
12 h after light	12.902999999999999	11.9475	13.8585
4 h after dark	18.33685	17.2151	19.4586
8 h after dark	20.6615	19.7501	21.5729
12 h after dark	19.13355	18.6938	19.5733