condition mean min max 4 h after light 766.2 766.2 766.2 8 h after light 824.9 785.3 864.5 12 h after light 717.05 675.7 758.4 4 h after dark 485.9 385.0 586.8 8 h after dark 417.2 384.9 449.5 12 h after dark 453.45 412.4 494.5