condition mean min max 4 h after light 5.305705 4.63011 5.9813 8 h after light 4.997495000000001 4.99429 5.0007 12 h after light 7.018075 6.29167 7.74448 4 h after dark 9.42868 8.96978 9.88758 8 h after dark 9.974305000000001 9.61571 10.3329 12 h after dark 7.9511650000000005 7.75703 8.1453