condition mean min max 4 h after light 6198.1 6198.1 6198.1 8 h after light 5023.35 4205.8 5840.9 12 h after light 2592.8500000000004 1396.4 3789.3 4 h after dark 2044.1 1492.5 2595.7 8 h after dark 2812.15 1964.9 3659.4 12 h after dark 6029.950000000001 3168.8 8891.1