condition mean min max 0 h after light 7.164645 6.30388 8.02541 4 h after light 9.055095 8.63195 9.47824 8 h after light 11.079049999999999 10.6467 11.5114 4 h after dark 7.987825 7.70284 8.27281 8 h after dark 10.2368 10.1445 10.3291 12 h after dark 8.46289 8.10571 8.82007