condition mean min max 4 h after light 160.5 160.5 160.5 8 h after light 167.45 164.1 170.8 12 h after light 289.1 201.6 376.6 4 h after dark 481.15 351.7 610.6 8 h after dark 510.15 455.9 564.4 12 h after dark 379.9 286.5 473.3