condition mean min max 0 h after light 21.01775 18.7641 23.2714 4 h after light 8.76769 5.78338 11.752 8 h after light 7.37316 5.2 9.54632 4 h after dark 8.373895 6.15619 10.5916 8 h after dark 13.75465 13.4163 14.093 12 h after dark 15.692300000000001 15.3045 16.0801