Growing with Hydroponics
Compact Fluorescent Lighting (CFL)

   Compact fluorescent lighting is the cheapest way to grow herb. Of course, it is also the least effective. For vegetative growth, use the most blue temperature (5000k+), and for flowering use predominantly warm light (2500k-3000k). More information available here.

Metal Halide Lighting (MH)

   This system combines an HID metal halide bulb with a digital ballast. Metal Halide has a blue hue that makes it very effective for vegetative growth but not for flowering. These systems do use a lot of electricity and give off a decent amount of heat so you should always use them in conjunction with good ventilation. More information available here.

Light-Emitting Diode Technology (LED)

   LED technology is probably the future of growing. NASA is developing LED technology is hopes of using it to sustain life in outer-space. A good LED panel is expensive but gives off virtually no heat and uses less electricity than your television. The light is tuned red and blue, surprisingly the only 2 colors marijuana needs to flourish. More information available here.

High Pressure Sodium Lighting (HPS)

   HPS is another HID system and as such uses a bulb and a ballast. This system is recognized as the most effective way to grow. It does use a lot of electricity and give off some heat so only use HPS lighting in conjunction with good ventilation. More information available here.

   Hopefully you have a better idea of which lighting system to use. No matter what your choice, ventilation is always important. Stale air will stunt growth and invite insects, mildew, and other things you don’t need around your girls. You really can’t have too many fans! Anyway, lighting is usually the most expensive part of the setup, so once you figure that out its time to select some nutrients.
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