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Electronics Manufacturing & Production Handbook 2017


 

LEDs for horticulture
16 May 2018, Opto-Electronics

Würth Elektronik eiSos’ new WL-SMDC mono-colour ceramic LEDs for SMT assembly are optimally tailored to requirements in artificially illuminated greenhouses.

Besides the common colours of blue, yellow, green and red, these LEDs are also available in the wavelengths 450 nm (deep blue), 660 nm (hyper red) and 730 nm (far red). Their emission spectra correlate optimally with the absorption spectra of plant photosynthesis pigments.

While red and blue light provides plants with the most energy, different wavelengths control other growth processes. This fact is used in plant breeding with a controllable individual ‘light mix’. For instance, far red light (720 - 740 nm) in the infrared spectrum influences germination. This wavelength range can shorten the flowering time of plants, and promote elongation growth.

The horticulture LEDs are distinguished by high efficiency and brightness, as well as by their PPF values (photosynthetic photon flux, which determines the energy that plants can draw from LED light). The LEDs have a low thermal resistance, an electrically neutral heat path, small package size (3535) and low power loss.

For more information contact Jason Page, Würth Elektronik eiSos, +27 (0)71 259 9381, jason.page@we-online.com, www.we-online.com


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Further reading:

  • Infrared LED for iris recognition
    16 May 2018, Electrocomp, Opto-Electronics
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  • Dimmable LED driver
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    The AL1673 from Diodes Incorporated is a high-performance, single-stage LED driver-converter operating in flyback and buck-boost topologies, targeting dimmable LED lighting applications. It operates in ...
  • Reflective sensor immune to ambient light
    15 November 2017, TRX Electronics, Opto-Electronics
    The OPB9000 from TT Electronics is a reflective, CMOS logic output sensor with programmable sensitivity, output polarity, and drain select. The sensor features 25+ kilolux ambient light immunity along ...
  • Tri-stimulus colour sensor
    15 November 2017, Future Electronics, Opto-Electronics
    ams introduced the AS7264N, a tri-stimulus sensor which provides measurements of colour that closely match the human eye’s response to the visible light spectrum. It also accurately measures blue-light ...

 
 
         
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