Natural light, hands down it is the best way to grow. You could use regular skylights but skytubes work better and with them you can direct the light to exactly where you want it. No electricity and the upfront cost will often be less than a good electric lighting system. Our 14” sky tube will grow out a 4’X4’ area at 5’ or closer to the plants, perfect for a grow bed. Low profile, Hail resistant dome, single piece flashing, interior diffuser. Hire a professional or install it yourself, it comes with everything you need and includes a 6’ flexible highly reflective duct to put the light exactly where you want.