condition mean min max 4 h after light 4.81257 4.67322 4.95192 8 h after light 3.70815 3.53234 3.88396 12 h after light 6.9280100000000004 6.89724 6.95878 4 h after dark 7.394095 7.08379 7.7044 8 h after dark 7.7160150000000005 7.57014 7.86189 12 h after dark 6.271795 6.20108 6.34251