condition mean min max 4 h after light 5.283275 4.43773 6.12882 8 h after light 5.95059 5.65001 6.25117 12 h after light 6.63719 6.03167 7.24271 4 h after dark 8.0063 6.68362 10.3161 8 h after dark 10.10928 9.18231 11.1987 12 h after dark 6.13938 5.23523 7.61142