condition mean min max 4 h after light 1.625375 1.37498 1.87577 8 h after light 0.9671915 0.961351 0.973032 12 h after light 1.6326 1.36069 1.90451 4 h after dark 4.971636666666667 4.82535 5.24005 8 h after dark 3.8439566666666667 3.50212 4.30914 12 h after dark 4.197853333333333 3.89889 4.50336