condition mean min max 0 h after light 0.0 0.0 0.0 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 4 h after dark 0.84172 0.0 1.68344 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0