condition mean min max 3 h after light 0.0 0.0 0.0 6 h after light 0.0 0.0 0.0 9 h after light 0.0 0.0 0.0 12 h after light 0.039578 0.0 0.158312 3 h after dark 0.0 0.0 0.0 6 h after dark 0.09364966666666667 0.0 0.280949 9 h after dark 0.08460766666666668 0.0 0.253823 12 h after dark 0.075701 0.0 0.151402