Cannabis (marijuana) lighting

Light is vital to hemp to keep it alive. Through the process of photosynthesis, it converts light energy into chemical energy. The main role in this transformation is played by the photosynthetic pigment, chlorophyll. It plays the role of a kind of “antenna” that absorbs the energy emitted by the sun. Further, it is stored inside the cannabis with the help of biological membranes. This process can be represented as a kind of ability, due to which the absorption and use of quantum energy of light to transform carbon dioxide into organic matter. They are necessary for marijuana to build its own body and carry out various catabolic processes.

However, hemp does not need all the light in its entirety, but only its individual spectra. The most significant for her are:

Blue with a wavelength of 430-470 nm. It is especially needed during the growing season. With its help, the production of chlorophyll B is stimulated, which is necessary for the development of the root system, foliage and branches;
Red with a wavelength of 620-700 nm. It plays an important role in the flowering process of cannabis. With its help, chlorophyll A is created, which is responsible for strengthening the roots and forming buds;
Infrared radiation with a wavelength range between 730 nm and 30 μm. It is used by the plant to accelerate metabolism, which leads to an increase in the rate of growth and development;
Ultraviolet radiation. Its wavelength ranges from 10 to 400 nm. Cannabis needs it for the production of resin, which in nature protects the plant from negative environmental factors. Its increased amount will have a positive effect on the quality of the buds.

Outdoor lighting

Outdoor lighting for cannabis is handled by Mother Nature. Therefore, the grower should plant plants where there is as much light as possible. This place must be in direct sunlight for at least 8-10 hours a day. There should be as little shadows on the site as possible. It is best if at noon it creates partial shade so that the direct rays do not burn the plant root.

In order for all bushes to receive the same amount of light, seeds should be planted perpendicular to the axis of the sun’s motion. This will allow them to develop synchronously, which will result in stable yield indicators.

Everything must be done to ensure that marijuana receives a lot of light. If any branches create shadow, cut them off. Too much sun at lunchtime – create a canopy with fabric or branches.

The landing itself can be made no later than a month before the day of the summer solstice. After this day, the length of time the sun is in the sky will begin to decrease, which will not allow the plant to develop enough before the onset of the flowering period.

It should be understood that only autoflowering cannabis varieties can grow stronger in a month. Photoperiodic seeds must be planted with the onset of warmth, when the air temperature at night becomes at least 10-15 degrees. By this time, the sun will certainly provide enough light for the normal development of cannabis.

Indoor lighting

Indoors, hemp lighting falls entirely on the shoulders of the grower. He simply cannot do without an artificial light source. Growing lamps for cannabis need to have sufficient power and the correct spectral composition of light for the plant to realize its full potential for growth and yield. The most common lamps in the grower environment today are:

Sodium gas discharge (HPS). Until recently, they were considered the best lamps for cannabis cultivation. They emit increased proportions of the red and blue spectra, which makes the plant feel comfortable. The main disadvantage of HPS lamps is that they get very hot during operation. As a result, the temperature in the grow box rises significantly, which is a problem for the grower. Ventilation is essential when using sodium discharge lamps. They also need special fixtures and are environmentally unsafe;
Energy saving (ESL). Such lamps consume much less electricity than sodium lamps. They practically do not heat up during operation, which only slightly affects the temperature in the box. However, for cannabis cultivation, only 2 types of ESL are best suited – 2700k and 6400k. For full-fledged lighting, the grower will have to use two at the same time, since one is dominated by the blue spectrum, the other by the red. They can also be used singly for supplemental lighting;
Light-emitting diode (LED). Special LED phytolamps are considered the most suitable for growing cannabis these days. Their value has dropped significantly over the past few years, and therefore can easily be afforded by the average grower. They consume very little electricity and do not heat up during operation. Their maximum temperature is 40 degrees. There are bicolor, multicolor and full spectrum LED phytolamps.

As for the required luminous flux power, depending on the type of lamp, the following indicators are considered the standard:

ESL – from 150 to 300 W;
HPS – 150-400 W;
LED – 100-300 W.
It is recommended to choose the maximum value when the cultivation area is close to 1 m2, and the minimum – for one bush. It is also worth remembering that during the growing season, the plant needs more blue light spectrum, and for flowering – red. In order to have more resin, you should put ultraviolet lamps to sunshine during the ripening of the inflorescences.

Cannabis (marijuana) lighting
Scroll to top