condition mean min max 0 h after light 3.34503 3.13219 3.55787 4 h after light 3.86241 3.84491 3.87991 8 h after light 4.566065 4.26662 4.86551 4 h after dark 5.057055 4.96093 5.15318 8 h after dark 4.57502 4.30099 4.84905 12 h after dark 3.221235 3.21239 3.23008