Lighting assembly
First Claim
Patent Images
1. A horticultural lighting fixture comprising:
- only two light emitting diode (LED) groups including;
a first LED group comprising at least one LED, the first LED group exhibitingmain spectral characteristics in the photosynthetically active radiation (PAR) (400-700 nm) area, anda second LED group comprising at least one LED, the second LED group exhibitingat least one side spectral characteristics comprising a spectral peak having its peak wavelength in the 700-800 nm area,wherein all spectral peaks exhibited by the first LED group have peak wavelengths below 700 nm and all spectral peaks exhibited by the second LED group have peak wavelengths above 700 nm, andwherein intensities of emissions of the first LED group and the second LED group are independently adjustable during use.
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Abstract
A lighting fixture for facilitating plant growth and a light emitting component. The fixture includes a single light emission source LED device which provides at least two emission peaks in the wavelength range of 300-800 nm and at least one of the emission peaks has Full Width of Half Maximum (FWHM) at least 50 nm or higher. The emission peaks of the LED match well with a plant photosynthesis response spectrum and is therefore particularly suitable for high efficiency artificial lighting.
23 Citations
12 Claims
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1. A horticultural lighting fixture comprising:
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only two light emitting diode (LED) groups including; a first LED group comprising at least one LED, the first LED group exhibiting main spectral characteristics in the photosynthetically active radiation (PAR) (400-700 nm) area, and a second LED group comprising at least one LED, the second LED group exhibiting at least one side spectral characteristics comprising a spectral peak having its peak wavelength in the 700-800 nm area, wherein all spectral peaks exhibited by the first LED group have peak wavelengths below 700 nm and all spectral peaks exhibited by the second LED group have peak wavelengths above 700 nm, and wherein intensities of emissions of the first LED group and the second LED group are independently adjustable during use. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification