26Mar/12Off

Control the environment of your growroom – Lighting

The main purpose of almost every growing system is the crop yield gained as a result.  Anyone creating a hydroponic system or modifying an existing one has a wide variety of factors to take into consideration that can directly affect this yield, such as;

  • Temperature
  • Smell
  • PH Levels
  • Water treatment
  • Nutrients

Several blog posts over the past few weeks have been dedicated to these topics and more before now – however, today we’re focusing on the world of:

Lighting

It may be an obvious thing to point out, but the lighting in a hydroponic system is probably the most important part.  Photosynthesis is the process of absorbing sunlight and, using water and carbon dioxide, creating glucose (food) and oxygen.

The process of photosynthesis is the main influence on a plant’s growth and yield, so the importance of a lighting system cannot be understated.

A grow light has three essential components – the lamp itself to produce light, a ballast to regulate the power input of your lamps and a reflector to best direct the output of the lamps.  The interaction between these three parts is essential in the assembly of a functional and effective lighting system.

High Intensity Discharge (HID) lamps come in three varieties for different growing periods, each with different light outputs optimized for specific stages in a plant’s development.  Metal Halide lamps, for instance, emit more blue spectrum light, which is more effective on plants in the early, vegetative stages of development, while High Pressure Sodium (HPS) lamps produce more red spectrum light specifically for flowering periods.  Some types of lamp, such as Grolux or Sunmaster Dual Spectrum lamps, emit light from both the blue and red spectrums and can, as a result, be used for growing throughout the cycle.

Ballasts come in two major types – magnetic and digital.  Magnetic ballasts work by using a copper coil that becomes electromagnetic as power is drawn through it and into the lamp.  This magnetism reduces the amount of power that can be drawn through the coil, thus regulating what goes into the lamp.  Therefore, the bigger the coil, the higher wattage lamp can be safely powered.  Digital systems use a circuit board instead of an electromagnetic coil, losing far less energy through heat and noise than their magnetic counterparts.

Lamps don’t focus light on their own; that’s the job of a reflector.  Reflectors take all the light energy put out by a lamp and reduce wastage by focusing as much as possible at your crops.  This process means that your plants can absorb the same amount of light with less energy expense on your behalf, and is important in making sure your system is economical.

One more thing to remember is that all lamps produce heat – excess heat isn’t good news for your plants at all, as you can read in our blog entry here.  Don’t forget, you can always ask our experts at The BIG Shop for advice relating to this or any other growing topics.

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