condition mean min max 0 h after light 1.743675 0.0 3.48735 2 h after light 0.0 0.0 0.0 4 h after light 1.7717 0.0 3.5434 8 h after light 0.0 0.0 0.0 12 h after light 0.0 0.0 0.0 2 h after dark 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