condition mean min max 4 h after light 18.1164125 17.541275 18.69155 8 h after light 19.434224999999998 19.089097 19.779353 12 h after light 15.9401905 14.126366 17.754015 4 h after dark 18.969758 18.946946 18.99257 8 h after dark 18.8346455 18.629837 19.039454 12 h after dark 18.556413 18.556413 18.556413