condition mean min max 4 h after light 5358.7 5358.7 5358.7 8 h after light 5360.65 5318.6 5402.7 12 h after light 5417.9 5061.3 5774.5 4 h after dark 5936.95 4844.0 7029.9 8 h after dark 6712.45 6386.0 7038.9 12 h after dark 6420.55 6183.0 6658.1