condition mean min max 4 h after light 10.0470825 8.486424 11.607741 8 h after light 8.6789245 8.208759 9.14909 12 h after light 8.4482865 8.039264 8.857309 4 h after dark 8.2224545 7.587971 8.856938 8 h after dark 8.1878245 7.889225 8.486424 12 h after dark 8.416664 8.416664 8.416664