condition mean min max 4 h after light 7.694945000000001 6.1498 9.24009 8 h after light 6.57497 6.31574 6.8342 12 h after light 11.15835 10.9245 11.3922 4 h after dark 18.687433333333335 18.3291 18.9328 8 h after dark 17.050133333333335 16.2867 17.7571 12 h after dark 11.2392 10.4042 12.4676