condition	mean	min	max
4 h after light	6.4081	6.24857	6.57884
8 h after light	6.410866666666667	6.08053	6.663860000000001
12 h after light	6.36066	6.1569	6.607189999999999
4 h after dark	6.31903	6.17251	6.46652
8 h after dark	6.270463333333334	6.14832	6.44639
12 h after dark	6.16421	5.9549199999999995	6.28805