Buyers must verify that the electrical components (pumps, LED grow lights, and controllers) carry CE, UL, or RoHS certifications to ensure safety and compatibility with local grids. The irrigation system should feature UV sterilization or ozone water treatment to prevent mold and bacterial growth, which is the most common cause of crop failure. Additionally, check the LED spectrum configuration; a ratio optimized for leafy greens (blue and red peaks) significantly increases the nutrient density and protein content of the fodder.