condition mean min max 4 h after light 10.713762 9.264444 12.16308 8 h after light 12.38402 11.884729 12.883311 12 h after light 13.291517 13.291517 13.291517 4 h after dark 13.470367 13.350495 13.590239 8 h after dark 16.2476795 14.697882 17.797477 12 h after dark 14.984206 14.984206 14.984206