Yes, I'd still grow just one single tomato and send it on many millions of trips. I'll call it "travel-with-my-tomato.com" (Overnight charges may apply for trips to mars.) /s

So if your whole post about 10^7 100km trips was a joke, why did you post it?

Your point was that LEDs don't break even. My point is that there's a threshold at which they would.

If you only ever grew one tomato then you probably could buy a cheap plane ticket to deliver it, for less than the lights. So you'd be right, the LEDs would use more energy (cost to make, ship, and use) vs the delivery charges for the sun-grown (free energy) tomato from farther away - even if shipped expensively.

But if you grew millions of tomatoes from the same LEDs then you'd be wrong - now buying the grow lights is much more efficient than shipping in sun-grown tomatoes from even a few kilometers away.

How many tomatoes are you going to grow?

Is there some reason you keep ignoring the power it takes to run the lights? It take FAR more power for the lights than it does for the airplane.

You keep focusing on buying the lights, but I'm not talking about that. I'm talking about running the lights.