condition mean min max 4 h after light 91.994187 88.322386 95.665988 8 h after light 117.6321545 106.491029 128.77328 12 h after light 147.724954 141.750069 153.699839 4 h after dark 236.952573 153.699839 320.205307 8 h after dark 270.40002300000003 224.429684 316.370362 12 h after dark 171.847441 171.847441 171.847441