As early as the year 1927,LED grow lights were already discovered. But during those years, their amazing features and benefits were not yet known by then. It was only after many decades that, after studies, experts have developed the wonders of LED grow lights similar to what are being used for indoor gardening these days. It was in 1972 that the first LED was made and it was in the red color. Ten years later, LED became 10x more effective than it was when it was first discovered. These gave birth to more studies and even more detection of how effective LEDs are than other lighting products before.