If you happen to travel the Napa Valley during darkness these days, you can't help but notice all the bright spots around the valley. Those are nightime harvesting operations in progress. The two videos below were taken at 3:00 in the morning. This particular vineyard is not affiliated with Pina Napa Valley nor Pina Vineyard Management, but it was at a good location for filming, just below the Silverado Trail.
In the videos, you can hear the generator that runs the flood lights and the tractor running. You can see the pickers with their headlamps, dumping their boxes of grapes. And you can see the tractor driver/leafer, removing the leaves from the harvested grapes.