condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.04227225 0.0 0.0845445 12 h after light 0.0 0.0 0.0 4 h after dark 0.0 0.0 0.0 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0