condition mean min max 4 h after light 7042.4 7042.4 7042.4 8 h after light 7429.05 7206.8 7651.3 12 h after light 8212.6 7135.5 9289.7 4 h after dark 5978.25 3934.7 8021.8 8 h after dark 3533.1 3454.5 3611.7 12 h after dark 3727.1 3396.2 4058.0