condition mean min max 4 h after light 6.661685 6.48981 6.83356 8 h after light 11.771650000000001 11.0231 12.5202 12 h after light 21.603749999999998 20.7741 22.4334 4 h after dark 31.79275 31.699 31.8865 8 h after dark 26.7765 26.5155 27.0375 12 h after dark 16.34725 16.2262 16.4683