condition mean min max 4 h after light 8.352364999999999 6.88744 9.81729 8 h after light 9.34295 9.31987 9.36603 12 h after light 9.297705 8.55651 10.0389 4 h after dark 11.919033333333333 10.911 12.7829 8 h after dark 12.506966666666667 11.5356 13.2466 12 h after dark 8.98672 8.53382 9.74301