condition mean min max 4 h after light 821.5 821.5 821.5 8 h after light 614.9000000000001 612.2 617.6 12 h after light 647.4000000000001 529.1 765.7 4 h after dark 774.35 661.2 887.5 8 h after dark 639.7 621.0 658.4 12 h after dark 581.55 564.6 598.5