condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 4 h after dark 0.0277123 0.0 0.0554246 8 h after dark 0.0136895 0.0 0.027379 12 h after dark 0.0 0.0 0.0