"Light-box" accelerated growth of poinsettias: LED-only illumination

Charitha Weerasuriya; Stewart Detez; Soon Hock Ng; Andrew Hughes; Michael Callaway; Iain Harrison; Tomas Katkus; Saulius Juodkazis

doi:10.1117/12.2283396

2 January 2018 "Light-box" accelerated growth of poinsettias: LED-only illumination

Charitha Weerasuriya, Stewart Detez, Soon Hock Ng, Andrew Hughes, Michael Callaway, Iain Harrison, Tomas Katkus, Saulius Juodkazis

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Proceedings Volume 10456, Nanophotonics Australasia 2017; 104565Y (2018) https://doi.org/10.1117/12.2283396
Event: SPIE Nanophotonics Australasia, 2017, Melbourne, Australia

Abstract

For the current commercialized agricultural industry which requires a reduced product lead time to customer and supply all year round, an artificial light emitting diodes (LEDs)-based illumination has high potential due to high efficiency of electrical-to-light conversion. The main advantage of the deployed Red Green Blue Amber LED lighting system is colour mixing capability, which means ability to generate all the colours in the spectrum by using three or four primary colours LEDs. The accelerated plant growth was carried out in a “light-box” which was made to generate an artificial day/night cycle by moving the colour mixing ratio along the colour temperature curve of the chromaticity diagram. The control group of plants form the same initial batch was grown on the same shelf in a greenhouse at the same conditions with addition of artificial illumination by incandescent lamps for few hours. Costs and efficiency projections of LED lamps for horticultural applications is discussed together with required capital investment. The total cost of the “light-box” including LED lamps and electronics was 850 AUD.

Citation Download Citation

Charitha Weerasuriya, Stewart Detez, Soon Hock Ng, Andrew Hughes, Michael Callaway, Iain Harrison, Tomas Katkus, and Saulius Juodkazis ""Light-box" accelerated growth of poinsettias: LED-only illumination", Proc. SPIE 10456, Nanophotonics Australasia 2017, 104565Y (2 January 2018); https://doi.org/10.1117/12.2283396

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KEYWORDS

Light emitting diodes

Lamps

RGB color model

Electronics

LED lighting

Light sources and illumination

Spectroscopy

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