According to reports, a few days ago, Britain's Pleasant announced a horticultural LED lighting test on lily, which was carried out in the lily planter Together2Grow in Poeldijk, a village in the south of the Netherlands. It is reported that Together2Grow cooperates with Pleasant to use LED lighting as an auxiliary for high-pressure sodium lighting in greenhouses, which is used to grow lily of Virginia varieties. The test results showed that lily production increased by 20% with the assistance of solid-state lighting for 7 weeks.
It is understood that lily, also known as narcissus lily, yellow alstroemeria or parrot lily, is produced in South America and is now available all over the world. Pleasant previously published several horticultural lighting tests, one of which tested tomatoes. In all cases, solid state lighting is used as an auxiliary source of energy for plants.
It is understood that the test range is controlled under the existing high-pressure sodium lamp illumination environment, while the high-pressure sodium lamp can provide 70 μmoles/m2/sec photon quantum density (light intensity). In the solid-state lighting test, each 1000W high-pressure sodium lamp is installed next to it. With 7 Plessey Attis LED lamps, the photon flux density is increased to 130 μmoles/m2/sec.
The line graph shows the cumulative harvest yield per metre of lily flower stems and compares the different results of high pressure sodium lamp illumination with LED horticultural lighting.
The test results show that in the solid-state lighting environment, the flower yield is increased and the bloom is more lush. Bernard Zuidgeest, co-owner of Together2Grow, said: "At the moment, I am very satisfied with the results of the test. Under the LED lighting conditions, the plants look more lush and healthy, and the output has increased.
With more light, without the need for extra radiant heat, plants can still maintain the temperature of normal plants. We are working with Plesses to test more plant varieties and turn the greenhouse into a hybrid lighting system."
In addition to the 20% increase in yield, the lily grows an average of 2 grams per stem under LED horticultural lighting. It is reported that the LED lighting system combines far infrared, super red and blue LED. Pleasant said that LED lamps are 40% more efficient than high-pressure sodium lamps.