condition mean min max 4 h after light 3213.9 3187.5 3240.3 8 h after light 6369.18 6223.05 6515.31 12 h after light 7348.395 7315.02 7381.77 4 h after dark 3031.14 2670.49 3391.79 8 h after dark 2013.0950000000003 1960.93 2065.26 12 h after dark 1600.7 1561.41 1639.99