condition mean min max 4 h after light 501.1 501.1 501.1 8 h after light 351.35 312.2 390.5 12 h after light 416.95 309.0 524.9 4 h after dark 388.1 298.0 478.2 8 h after dark 332.55 262.6 402.5 12 h after dark 386.15 370.0 402.3