The LED lighting system at the Evergrow grow house in Tumwater, Wash., on Oct. 19, 2016.
The LED lighting system at the Evergrow grow house in Tumwater, Wash., on Oct. 19, 2016. Ian C. Bates The New York Times
The LED lighting system at the Evergrow grow house in Tumwater, Wash., on Oct. 19, 2016. Ian C. Bates The New York Times