condition mean min max 0 h after light 17.15595 14.7201 19.5918 4 h after light 9.80823 9.26836 10.3481 8 h after light 24.08775 21.8219 26.3536 4 h after dark 20.6541 19.3177 21.9905 8 h after dark 17.6308 13.8987 21.3629 12 h after dark 10.352145 9.08399 11.6203