condition mean min max 4 h after light 1049.728269 928.932971 1170.523567 8 h after light 1106.1075045 1017.334702 1194.880307 12 h after light 1000.571635 923.404855 1077.738415 4 h after dark 1549.9387265 1045.616672 2054.260781 8 h after dark 1716.883671 1378.09406 2055.673282 12 h after dark 1191.547614 1191.547614 1191.547614