Marijuana Lighting Tips

Since lighting for marijuana is extremely important, Concept420 has put together a list of marijuana lighting tips and tricks to ensuring the best growth for your plants.

  • Although natural sunlight is the best form of light for growing plants, their life cycle can be controlled more effectively with artificial lighting
  • The life cycle of the Cannabis plant is determined by the daily photoperiod (hours of light per day).
  • A young marijuana plant tends to grow faster if it is grown under continuous light for the first two months of it’s development.
  • Although the lamps should be kept as close as possible to the growing tips, they should never be allowed to touch the plants.
  • The best light for plant growth emits high intensities of the blue and red bands of the light spectrum.
  • Fluorescent light is one of the most effective source of artificial light readily available to home growers
  • Metal Halide lamps are better than most fluorescents, because they radiate more light in the blue and white bands of the light spectrum.
  • If your lights, after being on for a while, are too hot to touch with your hand, they are probably also too hot to be close to the growing tips.
  • The amount of light you supply your plants depends on the size of the garden, but at least 20 watts per square foot is recommended.
  • Although Metal Halide lamps are generally considered a better light source for marijuana growth, they use a lot more electricity than fluorescent.
  • Under artificial light, a marijuana plant can grow from three to six feet tall in three to four months.
  • Plants entering the vegetative stage enjoy up to twenty two hours of light per day, while twelve hours or less is required for flowering.
  • The more light you give your plants, the faster they will grow.
  • Lamps should be fixed to the roof in such a way that they can easily be raised as the plant grows in height.
  • The use of aluminum foil reflectors ensures that the light is spread more uniformly around the plants.
  • To increase the humidity of the air in a small, enclosed garden, place a small bowl of water in the growroom.
  • You could use a small fan to cool down your plants, if the lights in a small growroom raise the temperature too much.
  • Plants grown in conditions of varying daily light patterns will not settle into a regular life cycle and will grow poorly.
  • If there is insufficient light in the growroom, the plants will often grow tall and thin, in search of the light.
  • Do not “wake up” your plants by switching on the lights if they are in the dark period of their daily light cycle.
  • Plants grown with a long daily photoperiod, will require more frequent watering than those grown with less light.
  • Although incandescent, or screw-in light-bulbs are usually not suitable for good growth, they can be used in conjunction with fluorescent tubes.
  • If the edges of the leaves near the lights and growing tips start curling up, it usually means that they are getting too hot.
  • A Cannabis plant will grow with as little as six hours of light per day, but requires more than twelve hours per day for good strong growth.
  • A plant grown with insufficient light may sometimes develop disfigured leaves with only one or two blades per leaf.
  • If your growroom has a window, you should consider covering it up to prevent daylight from interfering with your own photoperiod.
  • If you have a few plants growing unevenly under one light, you could raise the pots of the smallest plants by placing them on a few bricks.
  • Although easy to control, the daily light photoperiod is the single most important factor influencing the growth of your plants.
  • Cannabis plants require less than twelve hours of light per day for at least two weeks before you can expect to see the first signs of flowers appearing.
  • Never increase the daily light photoperiod to more than twelve hours, once your plants have started flowering.
  • A marijuana plant grown indoors with lots of light will often grow larger and more potent than a similar plant growing outdoors in natural light.
  • To increase the amount of light available to the lower branches, you could mount extra fluorescent tubes vertically, onto the walls of your growroom.