condition	mean	min	max
4 h after light	15.622699999999998	15.2281	16.0173
8 h after light	9.88033	9.21246	10.5482
12 h after light	8.891829999999999	8.49348	9.29018
4 h after dark	18.5554	17.7464	19.8734
8 h after dark	19.31736666666667	17.3614	21.0454
12 h after dark	20.4632	16.2782	22.9328