condition	mean	min	max
4 h after light	6.812865	6.6364	6.98933
8 h after light	6.151675	5.55876	6.74459
12 h after light	5.89769	5.52992	6.26546
4 h after dark	7.14966	7.09955	7.19977
8 h after dark	6.88547	6.25216	7.51878
12 h after dark	8.23159	8.09773	8.36545