condition mean min max 4 h after light 518.6 518.6 518.6 8 h after light 500.8 433.5 568.1 12 h after light 515.85 409.6 622.1 4 h after dark 877.2 567.5 1186.9 8 h after dark 1033.4 955.0 1111.8 12 h after dark 823.9000000000001 806.2 841.6