

Well… In my case, as many potatoes as you want. Even if I grow it on an industrial scale, I will only need to pay 4% sales tax. And for myself, I can grow at least 100+ kg of potatoes without any problems. (Because of the size of the plots, I can literally grow tons of potatoes).
And yes, I use UV lamps for seedlings every spring. Just like literally everything in my village. This happens when the daylight is very short. These are the countries with risky agriculture. I think it would be funny for some foreigners to watch the picture of the village where in every house at night with ultraviolet light shining on the windowsills =)
What a picture?