condition	mean	min	max
4 h after light	6.31881	6.25943	6.37819
8 h after light	9.662765	9.30043	10.0251
12 h after light	21.64745	19.6931	23.6018
4 h after dark	15.680266666666666	15.3913	15.9699
8 h after dark	14.088466666666665	12.937	14.7762
12 h after dark	10.025739999999999	9.02428	11.7432