You are now visiting our Global professional lighting website, visit your local website by going to the USA website
You are now visiting the Philips lighting website. A localized version is available for you.

    Study: the effect of 100% LEDs on quality of rose cultivation

    Study: the effect of 100% LEDs on quality of rose cultivation

    • Intended result: larger flowers and higher branch weight
    • Improved energy balance due to lower electricity consumption
    • Trial as part of The New Cultivation: optimal production and energy-efficient method of cultivation

      Philips Lighting, a company owned by Royal Philips (NYSE: PHG, AEX: PHIA) and the global market leader in lighting, is helping rose nurseries to improve quality and increase yields. Philips is involved in a trial that began in April 2016 at the Delphy Improvement Centre in Bleiswijk. In this trial 100% GreenPower LED toplighting with a light level of 200 µmol/m²/s is being used.

    Effect on quality and branch weight


    The study, which will go on for 18 months, will provide information about the effect of 100% LEDs on the quality and branch weight of roses. The trial ties in with the principles of The New Cultivation: an energy-efficient method of cultivation combined with optimal production. The project is receiving support from the Rose crop cooperative and is partly financed by ‘Kas als Energiebron’ (‘Greenhouse as a source of energy’), the Dutch Ministry of Economic Affairs' and ‘LTO Glaskracht Nederland's’ innovation and action program.


    The aim of the study is to demonstrate that cultivation using 100% LEDs is possible. LEDs are the key to efficient, energy-saving cultivation, which also makes for a better-quality end product. Higher and higher light intensities are being used in rose cultivation because the crop performs best under these conditions. Lamps that use old technology produce excess heat. With LED toplighting, higher light levels can be achieved with less excess heat.

    Improved energy balance


    “Lighting with LEDs improves the balance between light and heat, allowing screens to be kept closed and creating a uniform climate,” says Arie de Gelder, project leader of the rose trial and researcher at Wageningen University and Research Centre. “The main challenge is to be found in the plant temperature at the top of the crop as compared with conventional lighting. We are very curious to see how the rose crop responds to this. Eventually this combination of light and temperature should give rise to a further improvement in quality in the form of larger flowers and higher branch weight.”

    Sustainable cultivation


    In rose cultivation, a 25% reduction in electricity consumption can be achieved with LEDs as compared with conventional lighting. A combination of heat exchangers and a heat pump makes it possible to eliminate fossil energy and take a step in the direction of sustainable cultivation. Thanks to a sophisticated combination of lighting, heating and cooling, with maximum usage of screens, no excess heat will be produced. The direct result of this is lower CO₂ emissions. There will also be lower light emission if the screens stay closed for longer. The balanced energy distribution and movement of air make for a resilient crop that is less sensitive to mildew.

    Optimal lighting


    For Philips, this trial is another step forward. Following successes achieved with tomatoes and strawberries under LEDs, roses are the next trial crop. “We expect to be able to move to even higher light levels with LEDs, with control of light and temperature being separated,” says Leontiene van Genuchten, plant specialist at Philips. “Many growers are convinced that HPS lamps are required in order to obtain a suitable crop temperature. In this trial we will find out whether we get at least the same result using a different cultivation method.”

    Contact us

    Contact certified partners


    Philips products are sold through a global network of certified partners. Find partners in your region for more information about Philips LED grow lights.

    Contact Philips


    What are the best LED grow lights for your situation? We are here to help. Please use our form to submit your request.



    Learn more about LED lighting in horticulture by reading our latest articles and case studies.