by Jorge Cervantes
Light
Provide light with fluorescent tubes, compact fluorescent lamps (CFLs), metal halide lamps, or high pressure (HP) sodium lamps. Each lamp has positive points and limiting points. Fluorescent lamps are best suited to growing seedlings and clones. Inexpensive CFLs can grow small crops from start to finish. The best CFLs for growing are available in wattages from 65-125. More expensive and versatile metal halide and HP sodium high intensity discharge (HID) lamps are available in many wattages (from 150 – 1500) and color spectrums. Both can be used to grow crops from beginning to end.