condition	mean	min	max
4 h after light	7.57981	6.49814	8.66148
8 h after light	6.008895	5.82466	6.19313
12 h after light	7.880445	7.45709	8.3038
4 h after dark	15.045966666666667	14.0901	15.8551
8 h after dark	15.496	13.3368	18.4437
12 h after dark	14.049966666666666	13.3083	14.6359