WP34

WP34 LUMILEDS | Alldatasheet

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WP34 LUXEON SunPlus Series Lime LEDs Produce High Yield and Nutrition in Leafy Greens White Paper 20171213 ©2017 Lumileds Holding B.V. All rights reserved. LUXEON SunPlus Series Lime LEDs Produce High Yield and Nutrition in Leafy Greens Lime, Green and Purple LEDs from Lumileds have shown to produce high red lettuce yields while raising the concentrations of essential nutrients that contribute to human health. The study was conducted by Tessa Pocock PhD, Senior Research Scientist at the Center for Lighting Enabled Systems and Applications (LESA), Rensselaer Polytechnic Institute, Troy, NY. LEDs are rapidly becoming the light source of choice for indoor horticultural applications due to the ability to customize the light spectra to meet the growth and nutritional needs of the plant of interest—something that legacy horticulture light sources cannot do. In addition, LEDs have superior lifetimes, greater energy efficiency versus fluorescent tubes used in vertical farms and plant factories, require low to no maintenance and emit less heat to the growing environment. Salad crops are consumed for their nutritive and health benefits rather than for caloric requirements. If grown properly, they can be an excellent source of nutrients including antioxidants, which help control the level of damaging free radicals in the body. In this study, the concentrations of chlorophyll as well as two important bioactive antioxidants—the anthocyanins and the carotenoids—were monitored and quantified. Carotenoids are a family of yellow and orange pigments including beta- carotene (the precursor of vitamin A) and zeaxanthin and lutein, which are yellow pigments that protect the retina against high energy radiation (eg. UV and blue light).1 Anthocyanins are red, blue and purple pigments and their dietary uptake is positively correlated with human health such as in the treatment of vision disorders, protection against neurological disorders, reduction in incidence of cardiovascular disease, increase in cognitive ability and enhancement of antioxidant protection.2 Previous studies using commercially available LEDs indicated that many leafy greens grown under phosphor converted (PC) LEDs had large, thin and pale leaves with consistently lower levels of chlorophyll and anthocyanins3.

(above ground biomass) and nutritional quality of red lettuce Rouxai was examined. output in red (600-700 nm), blue (400-500 nm) and green (500-600 nm) wavelength ranges (spectral ratios) between fixtures. replicates were performed and statistical differences between light trials were determined (KruskalWallis ANOVA, SigmaPlot v11). Figure 1. Rouxai red lettuce is grown for 14 days under LUXEON SunPlus Lime + Purple, LUXEON SunPlus Purple + LUXEON 3535L Green and LUXEON SunPlus Purple, Valoya, and RGB fixtures in Adaptis chambers.

Figure 2. Spectral photon distribution measured as photon flux density (PFD) for each light source. To enable uniform comparison, SPD was measured at the center of each chamber at the crop level.

Figure 3. Light grids measured with the JAZ spectrometer within the growth chambers. Plant material used for these trials were grown

Figure 8. Photochemistry results indicated good plant health (Fv/Fm); efficient photochemistry Y(II); and the induction of photo-protective mechanisms (NPQ) using all light sources.

©2017 Lumileds Holding B.V. All rights reserved. LUXEON is a registered trademark of the Lumileds Holding B.V. in the United States and other countries. lumileds.com Neither Lumileds Holding B.V. nor its affiliates shall be liable for any kind of loss of data or any other damages, direct, indirect or consequential, resulting from the use of the provided information and data. Although Lumileds Holding B.V. and/or its affiliates have attempted to provide the most accurate information and data, the materials and services information and data are provided “as is,” and neither Lumileds Holding B.V. nor its affiliates warrants or guarantees the contents and correctness of the provided information and data. Lumileds Holding B.V. and its affiliates reserve the right to make changes without notice. You as user agree to this disclaimer and user agreement with the download or use of the provided materials, information and data. A listing of Lumileds product/patent coverage may be accessed at lumileds.com/patents. WP34 LUXEON SunPlus Series Lime LEDs Produce High Yield and Nutrition in Leafy Greens White Paper 20171213 Conclusions Leafy greens are desirable crops for daily eating due to their nutritive value. This study showed that red lettuce Rouxai grown under specific LED spectra can have significantly higher yields as well as greater concentrations of anthocyanins and carotenoids. The LUXEON SunPlus Lime + Purple LEDs performed best in terms of yield (fresh weight) and antioxidant levels. The spectrum of this light source includes output in the far red range (700-800 nm) that can boost lettuce yields. The Valoya PC LEDs produced greens of comparable yield but statistically lower levels of antioxidants, indicating that the spectral photon distribution of phosphor down conversion can have different effects on crop quality. In summary, these data suggest that growth and nutrition are optimized using PC LEDs with strong royal blue, green, deep red and far red components found in the combination of LUXEON SunPlus Lime + Purple LEDs. The spectra that performed best for both yield (fresh weight) and nutrient concentrations were the LUXEON SunPlus Series Lime + Purple and Purple + Green LEDs. To effectively grow Rouxai red lettuce and similar crops in indoor environments, the use of Lime + Purple and Purple + Green LEDs from Lumileds demonstrated significant advantages. References eye. Annual Review of Nutrition. 23:171-201. 2. Lila MA. Anthocyanins and human health: An in vitro investigative approach. Journal of Biomedicine and Biotechnology 2004. 5: 305-313. 3. Pocock, T. (2015) (2015) Advanced lighting technology in controlled environment agriculture. Lighting, Research and Technology. 12/2015; DOI: 10.1177/1477153515622681. 659-668. About Lumileds Companies developing automotive, mobile, IoT and illumination lighting applications need a partner who can collaborate with them to push the boundaries of light. With over 100 years of inventions and industry firsts, Lumileds is a global lighting solutions company that helps customers around the world deliver differentiated solutions to gain and maintain a competitive edge. As the inventor of Xenon technology, a pioneer in halogen lighting and the leader in high performance LEDs, Lumileds builds innovation, quality and reliability into its technology, products and every customer engagement. Together with its customers, Lumileds is making the world safer, better and more beautiful—with light. To learn more about our lighting solutions, visit lumileds.com.