condition mean min max 3 h after light 1.9679633333333335 1.21154 3.00159 6 h after light 3.0373 1.87793 4.19753 9 h after light 2.6298333333333335 1.24193 3.89147 12 h after light 2.028818 0.966194 3.33071 3 h after dark 1.8204733333333334 1.31228 2.74758 6 h after dark 2.465883333333333 1.17159 3.21434 9 h after dark 2.49726 1.97213 3.06796 12 h after dark 1.187301 0.365363 2.07937