condition mean min max 4 h after light 569.7 569.7 569.7 8 h after light 380.75 343.9 417.6 12 h after light 327.25 242.6 411.9 4 h after dark 424.45 407.2 441.7 8 h after dark 690.6500000000001 307.6 1073.7 12 h after dark 1178.8 1010.0 1347.6