condition mean min max 4 h after light 9.7661765 8.881247 10.651106 8 h after light 9.3974735 8.93516 9.859787 12 h after light 9.8786505 8.86371 10.893591 4 h after dark 9.277683 8.655294 9.900072 8 h after dark 9.5439235 8.669061 10.418786 12 h after dark 8.538338 8.538338 8.538338