condition	mean	min	max
4 h after light	8.148	8.10328	8.19994
8 h after light	7.716896666666667	7.602060000000001	7.86914
12 h after light	7.97225	7.79833	8.0996
4 h after dark	7.68932	7.44175	7.8487800000000005
8 h after dark	7.77194	7.67581	7.84541
12 h after dark	7.953116666666666	7.87966	8.050289999999999