condition	mean	min	max
0 h after light	6.010925	6.00557	6.01628
4 h after light	6.005185	5.19207	6.8183
8 h after light	8.022935	7.1785	8.86737
4 h after dark	13.07125	12.0225	14.12
8 h after dark	8.92774	7.95278	9.9027
12 h after dark	6.523295	5.17966	7.86693