# US 9,516,818 B2 · Lighting assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,516,818 B2 - Document ID: US9516818B2 - Status: Granted - Kind: B2 - Application number: 13/390,370 - Filed: 2010-09-16 - Published: 2012-06-28 - Granted: 2016-12-13 - Earliest claimed: 2009-09-18 - Assignees: Valoya Oy - Applicants: Lars Aikala - Inventors: Lars Aikala - Web page: https://patentgrep.com/patent/US9516818B2 ## CPC - A01G 7/045: {with electric lighting} - F21K 9/64: using wavelength conversion means distinct or spaced from the light-generating element, e.g. a remote phosphor layer - H10H 20/851: Wavelength conversion means - H10H 20/8515: {not being in contact with the bodies} - H10H 20/853: characterised by their shape - H10H 20/857: Interconnections, e.g. lead-frames, bond wires or solder balls - H10W 90/00: Package configurations - F21Y 2115/10: Light-emitting diodes [LED] - H05B 45/30: Driver circuits - H10H 20/8512: {Wavelength conversion materials} - H10H 20/8513: {having two or more wavelength conversion materials} - H10H 20/856: Reflecting means - Y02P 60/14: Measures for saving energy, e.g. in green houses - A01G: HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING (picking of fruits, vegetables, hops or the like A01D46/00; propagating unicellular algae C12N1/12) - F21K: NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR - H10H: INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS - H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10 - F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## 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. ## Claims ### Claim 1 A horticultural light, comprising: at least two Light Emitting Diodes (LEDs) emitting light including far red light in a wavelength range from 700 nm-800 nm and reducing green light below the light intensity in each of the bands adjacent to the green light, the emitted light including spectral emission peaks matching carotenoid and chlorophyll absorption peaks, the at least two LEDs having first spectral characteristics with maximum 50 nm full width of half maximum and a peak wavelength in a range of 400 to 500 nm; and at least one adjustable dial configured to adjust at least one peak wavelength of the first spectral characteristics. ### Claim 2 (depends on 1) The light of claim 1, wherein at least a part or the whole of an emission at wavelengths of 500-600 nm is minimized and/or omitted and/or to be reduced below an intensity in a 400-500 nm band and below the intensity in a 600-700 nm band. ### Claim 3 (depends on 1) The light of claim 1, wherein the at least two LEDs have spectral characteristics with a freely adjustable peak in a wavelength range from 500 to 800 nm and that exhibit at least 30 nm full width of half maximum. ### Claim 4 (depends on 3) The light of claim 3, further comprising at least one electronic control system to switch first and the second LEDs independently on and off or alternatively dim independently by 0-100% power. ### Claim 5 (depends on 1) The light of claim 1, wherein emission intensities of spectral characteristics of the LEDs are adjustable. ### Claim 6 (depends on 1) The light of claim 1, wherein the at least two LEDs are of a first type and a second type, a ratio of LEDs of the first type to LEDs of the second type being 1 to 100. ### Claim 7 (depends on 1) The light of claim 1, wherein a photosynthetic photon flux (PPF) value of the light per Watt is 0.35 or higher. ### Claim 8 (depends on 1) The light of claim 1, wherein an emission decay rate difference of first and second spectral characteristics amounts to less than 20% during a first 10,000 hours usage, or during a first 25,000 hours usage. ### Claim 9 (depends on 1) The light of claim 1, wherein spectral emission characteristics, intensity, peak wavelength and full width of half maximum are controlled with selection and concentration of phosphor material. ### Claim 10 (depends on 1) The light of claim 1, wherein spectral emission characteristics, intensity, peak wavelength and full width of half maximum are controlled with blue emission characteristics of a LED chip. ### Claim 11 (depends on 1) The light of claim 1, wherein the at least two LEDs include a first LED that has phosphorescent spectral characteristics of a freely adjustable peak wavelength in the range of 500 nm to 800 nm range that exhibit at least 30 nm full width of half maximum, and first emission intensities of spectral characteristics adjustable in any ratio. ### Claim 12 (depends on 11) The light of claim 11, wherein the at least two LEDs include a second LED with one or more luminescent spectral characteristics with maximum 50 nm full width of half maximum and peak wavelength in the range of 400 to 500 nm, and optional phosphorescent spectral characteristics having freely adjustable peak wavelengths in the range of 450 nm to 800 nm. ### Claim 13 (depends on 1) The light of claim 1, wherein an up-conversion of LED emission is established by one or more of at least one semiconductor quantum dot, phosphor material, and sulfide material. ### Claim 14 A light for facilitating plant growth, comprising: at least two luminescent UV light emitting diodes (LEDs), with external emission characteristics, the luminescent UV LEDs emitting light including far red light in a wavelength range from 700 nm-800 nm and reducing green light below the light intensity in each of the bands adjacent to the green light, the emitted light including spectral emission peaks matching carotenoid and chlorophyll absorption peaks; and at least one adjustable dial configured to adjust phosphorescent emission intensities of the emitted light from the at least two LEDs in any ratio to accommodate plant growth, wherein the at least two LEDs have spectral characteristics with maximum 50 nm full width of half maximum and a peak wavelength in a range of 400 to 500 nm. ### Claim 15 (depends on 1) A method for enhancing plant growth, comprising: the at least one light of claim 1 emitting light to at least one plant. ### Claim 16 (depends on 1) The light of claim 1, wherein the at least two LEDs have second and third spectral characteristics having freely adjustable peak wavelengths in a range from 450 nm to 800 nm. ### Claim 17 A horticultural light, comprising: at least two Light Emitting Diodes (LEDs) emitting light including far red light in a wavelength range from 700 nm-800 nm and reducing green light below the light intensity in each of the bands adjacent to the green light, the emitted light including spectral emission peaks matching carotenoid and chlorophyll absorption peaks, whcrcin the at least two LEDs having spectral characteristics with maximum 50 nm full width of half maximum and a peak wavelength in a range of 400 to 500 nm; and at least one adjustable dial configured to adjust at least one peak wavelength of the spectral characteristics, wherein a wavelength up-conversion of radiation power of the LEDs is formed by at least two phosphor materials.