condition mean min max 0 h after light 1.87269 1.83015 1.91523 4 h after light 2.825675 2.78384 2.86751 8 h after light 2.48325 2.35295 2.61355 4 h after dark 2.92546 2.46476 3.38616 8 h after dark 3.39816 2.992 3.80432 12 h after dark 2.969125 2.7041 3.23415