> A 1000 Watt metal halide or high-pressure Na lamp is barely adequate to cover a square meter (if the only light source). 1000 Watts of metal halide or HPNa?

> A 1000 Watt metal halide or high-pressure Na lamp is barely adequate to cover a square meter (if the only light source). 1000 Watts of metal halide or HPNa? Per square meter? That's huge! You don't need anywhere near that kind of figures for growing salad in your kitchen. If you're working in a commercial gardening operation, then it's a different deal. But then you're either growing weed and/or have a huge area so the W/m^2 figure goes down. A single fluorescent tube in addition to natural light and your usual kitchen lighting goes a long way. Most plants are not very sensitive to pH figures nor do they suck up nutrients like crazy. Automated pH and EC measurement would be nice, though. Even better if this garden could automatically add in nutrients and acid if necessary. Lessons from growing weed are not necessarily valid for food production.