condition	mean	min	max
4 h after light	8.54006	8.1494	8.74055
8 h after light	8.74385	8.401760000000001	8.938939999999999
12 h after light	8.49629	7.98775	8.82731
4 h after dark	8.32207	8.00993	8.553519999999999
8 h after dark	8.191873333333334	7.9318800000000005	8.36968
12 h after dark	8.156146666666666	7.72095	8.470310000000001