condition mean min max 4 h after light 7.801159999999999 6.36441 9.23791 8 h after light 9.056305 8.66705 9.44556 12 h after light 8.9876 7.8363 10.1389 4 h after dark 12.31345 11.8923 12.7346 8 h after dark 10.91305 10.7002 11.1259 12 h after dark 9.04493 8.09011 9.99975