condition mean min max 4 h after light 513.3 513.3 513.3 8 h after light 422.6 352.5 492.7 12 h after light 593.05 590.4 595.7 4 h after dark 664.15 597.3 731.0 8 h after dark 624.9000000000001 546.7 703.1 12 h after dark 650.95 647.1 654.8