condition mean min max 0 h after light 0.9564590000000001 0.899348 1.01357 4 h after light 1.7993700000000001 1.60365 1.99509 8 h after light 2.146945 1.89075 2.40314 4 h after dark 2.98694 2.98105 2.99283 8 h after dark 2.166005 1.67477 2.65724 12 h after dark 0.777313 0.768754 0.785872