condition mean min max 4 h after light 3.83901 3.6033 4.07472 8 h after light 4.820415 4.8138 4.82703 12 h after light 5.19365 5.05974 5.32756 4 h after dark 8.10253 7.51766 8.63864 8 h after dark 7.8130033333333335 7.36816 8.41567 12 h after dark 8.02226 7.5873 8.85234