condition mean min max 4 h after light 494.2 494.2 494.2 8 h after light 502.05 455.1 549.0 12 h after light 546.3 537.6 555.0 4 h after dark 747.0 541.4 952.6 8 h after dark 584.1500000000001 527.1 641.2 12 h after dark 557.55 548.6 566.5