Your plants have edema. Too much watering, too cold, and too little light. LED's must be high quality with full spectrum.
"One of the drawbacks of LED clusters is that they are directional. This makes them ideal for spotlights, but not as well suited for ambient lighting. Their directionality isn't as noticeable inside a phosphor-coated casing, because the entire casing glows, but the bulk of the light still emerges from the top of the bulb. The quality of light that an LED emits depends on the circuitry of the bulb, and there's a large difference between bulbs. The best bulbs, which include high-powered circuitry, produce full-spectrum white light comparable to that produced by halogen bulbs -- high-temperature incandescents. Lower-quality LEDs can be comparatively dim."
https://en.tomathouse.com/edema.html