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 0.0179003 0.0 0.0358006 4 h after dark 0.0288711 0.0 0.0866133 8 h after dark 0.0 0.0 0.0 12 h after dark 0.0 0.0 0.0