In the tropics, they use diffused light storage for potatoes. You basically want to keep the insects and rodents away from them, protect them from high temperatures, and keep them in enough light to reduce sprouting when dormancy ends. Some shelving wrapped in shade cloth, located in a shady spot would be a minimal solution. Or, if you have a cool room in your house with a window, you could keep them there. You should have no problems with your seed potatoes being ready to plant. Potatoes stored in warm temperatures will have only two or three months of dormancy.
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