Hey guys, I was wondering if anyone could tell me if there is any difference between this three dollar CFL http://www.1000bulbs.com/product/36676/FC42-801042.html and this thirteen dollar CFL http://www.1000bulbs.com/product/2237/FC42-80891.html . From what I can tell they are both 2700k 42 watt...
I am also new at this, but I know that NPK stands for Nitrogen - Phosphorous - Potassium. The ratio depends on a lot of things, first of all what medium are you planning on growing in?