condition mean min max 4 h after light 166.5 166.5 166.5 8 h after light 132.55 124.5 140.6 12 h after light 156.2 132.8 179.6 4 h after dark 271.65 235.4 307.9 8 h after dark 363.6 348.1 379.1 12 h after dark 265.95 256.9 275.0