LED lighting is a development that also offers significant opportunities for greenhouse horticulture. PL Light Systems was quick to recognise the possibilities that this new technology opens up, and amassed extensive experience with this type of lighting in its own test greenhouse. We have incorporated the results from our test installations into the various LED systems that we supply.

Hortiled for multi-layer cultivation
The Hortiled system was specifically developed for the multi-layer cultivation of plant material in cultivation rooms. The advantages of this system compared with conventional systems are the unprecedented level of energy savings, lower heat generation, combined with a much longer system lifespan. An additional benefit, when it comes to cultivation techniques, is that the colour spectrum can be uniquely configured to suit the requirements of the crop. Thanks to the wide (150-degree) LED angle of radiation, it is possible to create an optimum light distribution at a minimum distance from the crop. This enables growers to install more layers in a cultivation cabin and thus to use the space more efficiently.

LED interlighting fixture for tall crops
PL Light Systems has developed the LED interlighting fixture specifically for tall greenhouse crops. An LED system placed between the plants enables more light to reach the plants in an optimal manner and ensures that light penetrates more deeply into the crop in order to stimulate growth. The major advantage here is that LED fixtures generate a lot less heat than SON-T lighting fixtures. The result is that more light reaches the plants directly without additional heat produced in the greenhouse and without any burn damage caused to plants. The colour of the light can also be configured to suit the requirements of the plants.

Expected: top fixture with LED
Developments in LED lighting are on going, and that means at PL Light Systems and Hortilux Schréder too. An LED top-lighting solution, as well as other innovative LED products are currently under research, testing, and near term launch possibilities.

LED lighting advice
Hortiled (multi-layer cultivation)
Young plants
Plants in a small space (without height)

LED interlighting
Tall greenhouse crops
–       Tomatoes
–       Peppers
–       Cucumbers

The advantages of LED lighting
–   Virtually no radiation heat directed towards the crop. The additional heat generated by lighting often limits the duration of the lighting.
–   Great light-design flexibility with LED, as the designer no longer has to be constrained by a single lamp output
–   Custom colours configurations (based on specific plant requirements).
–   Various light colours are suitable for use as control light as these give signals to the plants.
–   LED light is extremely efficient (micromole-µmol/watt).