RE: Blumat tropf automatic drip irrigation watering system for indoor growtent

http://theconversation.com/food-security-vertical-farming-sounds-fantastic-until-you-consider-its-energy-use-102657

This is basically what i'm talking about. The sun is free vs artificial lights which are expensive. So for commercial farming that's a big disadvantage because you can only sell it for market prices. How can you compete with outdoor farming? ...