condition mean min max 4 h after light 3.317375 3.05289 3.58186 8 h after light 4.225475 3.98631 4.46464 12 h after light 4.239215 3.6164 4.86203 4 h after dark 6.478540000000001 6.24502 6.71206 8 h after dark 5.57832 5.4843 5.67234 12 h after dark 5.37458 4.94922 5.79994