condition mean min max 4 h after light 59.7528 47.620378 71.885222 8 h after light 41.260450500000005 35.704361 46.81654 12 h after light 34.169343 30.562236 37.77645 4 h after dark 21.1854815 19.805107 22.565856 8 h after dark 17.9208285 16.593153 19.248504 12 h after dark 111.183575 111.183575 111.183575