condition mean min max 4 h after light 39.201169 36.885522 41.516816 8 h after light 41.6347545 33.634411 49.635098 12 h after light 60.2063285 59.931073 60.481584 4 h after dark 37.863822 26.385078 49.342566 8 h after dark 39.012266 27.316605 50.707927 12 h after dark 52.863271 52.863271 52.863271