condition mean min max 0 h after light 24.9518 24.9213 24.9823 4 h after light 12.7701 12.0294 13.5108 8 h after light 16.90905 15.8806 17.9375 4 h after dark 18.3148 15.1149 21.5147 8 h after dark 13.92075 13.1847 14.6568 12 h after dark 20.02935 16.3732 23.6855