condition mean min max 4 h after light 1374.0 1374.0 1374.0 8 h after light 1268.85 1264.5 1273.2 12 h after light 1198.2 1100.7 1295.7 4 h after dark 1295.85 1141.7 1450.0 8 h after dark 1495.7 1345.2 1646.2 12 h after dark 1549.25 1529.7 1568.8