A tincture is a liquid — usually an oil or an alcohol base — which has been infused with CBD oil. CBD oil tinctures are taken by mouth. When taken using this method, the CBD in the tincture can be absorbed pretty easily.
As the plants get taller and start blooming, you may need to get a couple more CFLs to light them from the sides. Basically if you see any dark or shadowy areas that are more than 6 inches from a CFL, then you should get another CFL to plug in that ‘hole.’ CBD oil.