condition mean min max 4 h after light 14.815686499999998 12.086846 17.544527 8 h after light 13.393207499999999 11.076936 15.709479 12 h after light 18.5630115 15.097445 22.028578 4 h after dark 17.3263155 15.972134 18.680497 8 h after dark 22.3230885 20.510833 24.135344 12 h after dark 16.00549 16.00549 16.00549