condition mean min max 4 h after light 0.0 0.0 0.0 8 h after light 0.16557 0.0 0.284868 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