Actually scientists use LEDs for plant growing studies because they are the most effective way to isolate specific wavelengths. LEDs are most likely going to be the future for growing, and lighting in general, and they use so much less electricity that they actually end up being quite affordable in the long run, and no big electricity bill keeps the other heat off of you (the law I mean). And they ONLY emit the EXACT wavelenghts that plants use, and nothing else. The Solaroasis LED grow bars are actually quite affordable compared to other LED grow lights, as the other LEDs are not mass manufactured for the general public, but are made only to order for the scientific community.