If you look at https://district.farm/ https://district.farm/ as was citied in the root comment, you'll see they aren't using lights or heaters. California doesn

If you look at https://district.farm/ https://district.farm/ as was citied in the root comment, you'll see they aren't using lights or heaters. California doesn't require those. The energy usage and output of greenhouses varies significantly by seasons and region. You really need to do direct comparisons for individual bits of land instead of broad statements. It's probably worth the light and heat costs if a country cannot grow enough vegetables for it's population without it. The US doesn't have that issue, because we have lots of growing space with long growing seasons.