condition	mean	min	max
4 h after light	7.09185	7.00489	7.22699
8 h after light	7.192446666666667	6.982010000000001	7.5195
12 h after light	6.98048	6.80855	7.29788
4 h after dark	7.42633	7.1521	7.783530000000001
8 h after dark	7.628990000000001	7.45668	7.88323
12 h after dark	8.093646666666666	7.881460000000001	8.50009