condition mean min max 4 h after light 5.651345 4.76197 6.54072 8 h after light 4.70219 4.41802 4.98636 12 h after light 5.36777 5.35884 5.3767 4 h after dark 6.98196 6.6399 7.32392 8 h after dark 7.15353 6.97814 7.39672 12 h after dark 6.437413333333333 6.01329 6.76439