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How to choose the right assimilation lamps

How to choose the right assimilation lampsSunlight is essential for plant growth, but there is not always enough sunlight available for the horticultural sector. That is why many growers use assimilation lamps. Assimilation lamps are lamps that are used to supplement (a lack of) natural sunlight with artificial light, which stimulates plant growth. This ultimately leads to a better cultivation result. Different types of assimilation lamps are available. Which lamp is suitable for your situation depends on several factors. But how do you choose the right assimilation lamps? In this article our specialist explains.

HID/SON-T and LED lamps

The most commonly used assimilation lamps are HID lamps or SON-T lamps, but in recent years more and more LED lamps have been used in horticulture. The lamps use different techniques and are therefore suitable for different situations and applications.

HID or SON-T lamps

High Intensity Discharge (HID) lamps or SON-T lamps are assimilation lamps that use high-pressure lamps. They offer a broad spectrum of light and can therefore be used in all kinds of crops. The disadvantage of this broad spectrum of light, however, is that they also produce light that is not absorbed by the crop, so that some of the energy is lost.

LED lamps

LED lamps are available in a wide spectrum with red/blue and white light. This enables them to offer a very specific light spectrum. Red and blue light are most important for stimulating plant growth and therefore LED lamps are more efficient for assimilation than HID or SON-T lamps. These lamps also generate little radiant heat, so that the lamps can be hung closer to the crop. There are different types of LED lamps:
  • Growth led: these LED lamps can be used specifically during the growth phase of the crop to provide the plants with extra growth light. 
  • Top LED: these LED lamps are mounted at the top of the greenhouse. This can be done in addition to the existing assimilation lamps, but you can also use only LED lamps. 
    Interlight: these LED lamps can be used to supplement the existing lighting for large crops such as tomatoes, peppers and cucumbers. The LED lamps are placed between the crops, so that the leaves that normally do not catch sun or assimilation light are also exposed. 
    Production LED: if you grow in multiple vertical layers in a room without daylight, you can use a LED production module. These are strips that can be placed just above the crop. 
  • Steering light: these LED lamps can be used when the crop is already a bit further in growth and you want to influence, for example, the compactness or the flowering of the crop. 

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Questions about assimilation lamps

We recommend that you get proper advice from one of our specialists when choosing the right assimilation lamps. They can see and calculate which assimilation lamps are most suitable for your situation and achieve the highest efficiency. Please contact Ben Peters, or ask your question using the form below.


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