condition mean min max 4 h after light 2.53277 2.2397 2.82584 8 h after light 2.446955 2.35281 2.5411 12 h after light 2.529465 2.47945 2.57948 4 h after dark 3.42381 2.98509 3.83161 8 h after dark 3.4504533333333334 3.09515 3.89111 12 h after dark 2.7718133333333332 2.63778 2.96495