condition mean min max 4 h after light 510.0 510.0 510.0 8 h after light 594.05 522.0 666.1 12 h after light 549.45 533.3 565.6 4 h after dark 583.85 503.8 663.9 8 h after dark 617.5999999999999 551.4 683.8 12 h after dark 511.29999999999995 497.8 524.8