Plessey, a leading developer of award-winning LED technologies and manufacturer of solid-state lighting products, announces a partnership with leading Dutch alstroemeria grower Together2Grow, following a successful trial of its LED grow lights combined with existing high-pressure sodium (HPS) lighting in a hybrid installation.
The four-month trial, managed by Maarten Klein, Plessey’s Head Agronomist, has been running since the end of November 2016 at Together2Grow, to assess the benefits of adding LED to existing HPS lighting compared to just using HPS lamps. The alstroemeria variety tested was Virginia and the existing HPS light intensity of 70 micromoles/s/m² was supplemented with an extra 60 micromoles/s/m² of Plessey LEDs to achieve an average of 130 micromoles/s/m².
By the end of the trial, a yield increase over 20% was achieved for the hybrid LED/HPS installation compared to the control area with HPS lighting alone. Under the LED/HPS lights, the average weight per stem also increased by 2 grams.
As a result of this successful trial, Bernard Zuidgeest, co-owner of Together2Grow, has decided to team up with Plessey to conduct further trials on other alstroemeria varieties with a view to rolling out LED across the business.
Adding Plessey LED light fixtures to existing HPS lighting systems in a hybrid installation allows growers to give greater light intensity to their crop, for longer periods, with little extra heat to manage in the greenhouse. The plants continue to get radiant heat from the HPS lights but also gain the advantage of light wavelengths unique to the LEDs being used, including far‑red, hyper‑red and blue spectrum light. Plessey’s LED fixtures are at least 40% more efficient in energy consumption than HPS fixtures.
Jonathan Barton, Plessey’s Director for Grow Lights, commented:
“We are very excited about the results of the LED/HPS hybrid installation achieved at Together2Grow. In addition to the successful results achieved from a similar trial at Gebr Koot tomatoes, this provides evidence of the opportunity for flower growers, as well as vegetable growers, to add our LED lights to their existing HPS lighting to boost yields.”
Bernard Zuidgeest observes:
“I am very pleased with the results so far. The crop under LED was looking a lot fuller and healthier and the quality of the flowers was better. By adding no extra radiation heat, but more light, the plants still remained the right plant temperature. We will now trial more varieties with Plessey and plan to convert our greenhouses to hybrid lighting.”
The reaction time from alstroemeria to more light from the LEDs is about 7-8 weeks. The trial started in week 48 of 2016 and by week 2 of 2017 an increase in yield under the LED/HPS hybrid installation was seen week on week.
Full details of the trial results can be found by clicking here
Plessey is an award-winning provider of full-field emissive microLED displays that combine very high-density RGB pixel arrays with high-performance CMOS backplanes to produce very high-brightness, low-power and high-frame-rate image sources for head-mounted displays (HMDs), and augmented reality (AR) and virtual reality (VR) systems. Plessey operates leading-edge 150mm and 200mm wafer processing facilities to undertake design, test and assembly of LED products, and a comprehensive suite of photonic characterization and applications laboratories. For more information, visit Plessey’s website, Twitter, Facebook and LinkedIn pages.
Combining its expertise in the semiconductor and LED lighting industry with its design skills, Plessey has developed award winning innovations targeted at variety of applications including horticultural lighting. Plessey has specifically designed the Hyperion range of grow lights to deliver greater returns for commercial growers. The Hyperion grow lights can work alongside or can replace high pressure sodium grow lights.
Sam Langridge, Marketing Manager | firstname.lastname@example.org
+44 1752 693 000
Hannah Wright, Marketing Assistant | email@example.com
+44 1752 693 000
Jonathan Barton, Director Grow Lighting | firstname.lastname@example.org