Sometimes choosing the ideal lampada idroponica for your growing space may not seem easy, there are different technologies, different wattages and different light temperatures.
Cultivation Area and Number of Vessels
First of all it is important to start from your own cultivation space intended as square meters and not the number of vessels you want to use. In fact, the yield of an indoor greenhouse does not depend on the number of vases but on the power of the lamp. For example, if a 400W lamp is able to illuminate 1m2, little will change in terms of yield if we fill this space with 5 or 10 vases. Filling the greenhouse with 5 pots will allow more plants to grow, as they have more “per capita” space and will be better lit; these plants will have a good yield and a good quality of maturation. Instead, by filling the same space with 10 pots you will have a crop in which the plants have to compete with each other, they will have to grow less in terms of vegetative growth because otherwise the lamp would not be able to decently illuminate all the plants. In this case it is possible that a slightly higher yield is reached than in the previous case, but certainly the quality of maturation would be affected as a dense crop takes longer to complete maturation.
Decide on the Type of Lamp
Having said that we can add that there are two types of lamps that can be used for indoor growing: compact fluorescent lamps and discharge lamps.
The former, also called CFL, are suitable for small spaces as they emit light that is not too intense. These lamps do not produce too much heat when they are normally installed a few centimeters above the top of the plants so as to limit light dissipation as much as possible (that is, the luminous intensity is attenuated due to the path it must take before reaching the leaves). CFL lamps are ideal for spaces of less than 0.8m2, for germination and vegetative growth, moments in which plants do not require particular light intensities and where normally smaller vessels are used which allow more plants to be grouped in one limited space.
However, when passing into bloom, larger pots are used, plants need much more light to make complete and profuse blooms and need to be spaced more between them. In this case you can use discharge lamps of the HPS type (color temperature at about 2700K °, yellowish light, ideal for flowering) and MH (at 4000K °, cold white light, ideal for vegetative). These lamps emit much more light than CFL but also heat. For this reason, remember to keep a minimum distance between the lamp and the plants so that they are not burned in the upper parts. If you use discharge lamps it is always important to consider the height of your cultivation space in order to be sure that there is enough vertical space to keep us all.