I think it is a pretty cool fact that because of the ability to use LED lights in this manner where they emit only the ranges of light wavelengths that are beneficial to plants, you can actually capture sunlight with solar panels. Convert that light to electricity. Then re-emit that electricity as light through these narrow range LEDs as well as store it and emit it over longer periods of time. You actually end up with more plant growth than would be possible if the plants were directly in the sun.