condition mean min max 4 h after light 10.83397 10.374309 11.293631 8 h after light 11.9616945 11.3277 12.595689 12 h after light 10.8576625 9.86786 11.847465 4 h after dark 10.406087 10.197764 10.61441 8 h after dark 11.5233355 10.374309 12.672362 12 h after dark 9.624407 9.624407 9.624407