# US 2023/0263142 A1 · An aquaculture luminaire and lighting system, and a lighting method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0263142 A1 - Document ID: US20230263142A1 - Status: Published application - Kind: A1 - Application number: 18/024,115 - Filed: 2021-09-03 - Published: 2023-08-24 - Earliest claimed: 2020-09-03 - Assignees: Signify Holding B.V. - Applicants: Signify Holding B.V. - Inventors: MASSIMO TUMOLO; SRI ANDARI HUSEN; MARCELLINUS PETRUS CAROLUS KRIJN; LAMBERTUS ADRIANUS MARIN DE JONG; YANNICK MARTINUS DENISE MOREL - Web page: https://patentgrep.com/patent/US20230263142A1 ## CPC - A01K 63/06: Arrangements for heating or lighting in, or attached to, receptacles for live fish - A01K 79/02: by electrocution - F21V 14/04: by movement of reflectors {(in vehicle head lamps F21S41/675)} - F21V 23/0471: {the sensor detecting the proximity, the presence or the movement of an object or a person} - A01K 61/60: Floating cultivation devices, e.g. rafts or floating fish-farms - F21W 2131/308: for aquaria - Y02A 40/81: Aquaculture, e.g. of fish - A01K: ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS - F21V: FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR - F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS - Y02A: TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE ## Abstract An aquaculture luminaire (10, 12) generates below the water surface upward light (26) and downward light (24). The upward light (26) is all directed with an angle to the vertical greater than a threshold angle. The division of light between the upward and downward directions may be configurable. Alternatively or additionally, the threshold angle may be configurable so that it ensures the light exceeds the angle for total internal reflection at the water surface. In this way, the luminaire is adaptable to the intended installation position of the luminaire and/or the prevailing water surface conditions (e.g. waves). ## Claims ### Claim 1 An aquaculture luminaire for underwater use, comprising: a light source arrangement for generating a first light output portion and a second light output portion wherein, when the luminaire is in an intended operational orientation relative to the vertical, the light of the first light output portion has a downward direction component and the light of the second light output portion has an upward direction component, wherein the light of the second light output portion is all directed with an angle to the vertical greater than a threshold angle, wherein the light source arrangement comprises an array of light sources with different light sources providing a light output in different directions relative to the vertical, wherein the light source arrangement is configurable to adjust, in dependence on a depth at which the luminaire is to be used, a division of light between the first and second light output portions. ### Claim 2 (depends on 1) The luminaire of claim 1, wherein the array of light sources provide a light output in different radial directions relative to the vertical axis as well as different angles to the vertical axis. ### Claim 3 (depends on 1) The luminaire of claim 1, wherein the light source arrangement is dynamically configurable in use. ### Claim 4 (depends on 3) The luminaire of claim 3, comprising a tilt sensor for sensing an orientation of the luminaire relative to the vertical. ### Claim 5 (depends on 1) A lighting arrangement, comprising: at least one luminaire of claim 1; a float for floating on a surface of water; and a suspension system for suspending the at least one luminaire at a respective distance below the surface of the water, wherein the division of light between the first and second light output portions is configured in dependence on the respective distance. ### Claim 6 (depends on 5) A lighting system, comprising: a plurality of identical lighting arrangements of claim 5, at least some of which have their at least one luminaire at different depths and with differently configured division of light between the first and second light output portions. ### Claim 7 (depends on 3) A lighting system comprising: the luminaire of claim 3; a motion and/or position sensor for sensing a motion and/or position of a water surface above the luminaire; and a controller for adapting the threshold angle dynamically in dependence on the motion and/or position of a water surface. ### Claim 8 (depends on 7) The lighting system of claim 7, wherein the motion and/or position sensor comprises an accelerometer and a gyroscope. ### Claim 9 (depends on 7) The lighting system of claim 7, wherein the motion and/or position sensor comprises an array of accelerometers, and an array of gyroscopes for monitoring the water surface at a plurality of locations. ### Claim 10 (depends on 9) The lighting system of claim 9, wherein the controller is adapted to: monitor the water surface height at said plurality of locations over time; determine a wave velocity, amplitude and direction from said water surface heights; determine a critical angle of the water surface in the vicinity of the luminaire over time based on the wave velocity, amplitude and direction; and configure the threshold angle in dependence on the critical angle. ### Claim 11 (depends on 7) The lighting system of claim 7, further comprising: a float for floating on a surface of water; and a suspension system for suspending the luminaire at a distance below the surface of the water. ### Claim 12 A method of providing underwater lighting for aquaculture, comprising: providing a luminaire having a light source arrangement for generating a first light output portion and a second light output portion, wherein, when in an intended operational orientation relative to the vertical, the light of the first light output portion has a downward direction component and the light of the second light output portion has an upward direction component, wherein the light of the second light output portion is all directed with an angle to the vertical greater than a threshold angle; and configuring, by actuating selected light sources of an array of light sources of the light source arrangement with different light sources providing a light output in different directions relative to the vertical, and in dependence on a depth at which the luminaire is to be used, a division of light between the first and second light output portions. ### Claim 13 (depends on 12) The method of claim 12, comprising: monitoring the water surface height at a plurality of locations over time; determining a wave velocity, amplitude and direction from said surface heights; determining a critical angle of the water surface in the vicinity of the luminaire over time based on the wave velocity, amplitude and direction; and configuring the threshold angle dynamically in use in dependence on the critical angle. ### Claim 14 (depends on 1) The luminaire of claim 1, wherein the aquaculture luminaire comprises a beam shaping component in the path of the second light output portion and wherein the light source arrangement is configurable to adjust the threshold angle by adjusting the position of the beam shaping component. ### Claim 15 (depends on 12) The method of claim 12, wherein the luminaire comprises a beam shaping component in the path of the second light output portion, the method further comprising: configuring, by adjusting a position of the beam shaping component, the threshold angle of the luminaire.