{"@context":"https://schema.org","@type":"TechArticle","id":"FLV-LGT-001","slug":"lighting-flavor","canonical_url":"https://flavorotor.com/research/lighting-flavor","machine_readable_url":"https://flavorotor.com/research/data/chapters/lighting-flavor.json","markdown_url":"https://flavorotor.com/research/markdown/lighting-flavor","title":"Light as a flavour-control variable","description":"How spectrum, PPFD, DLI, photoperiod and developmental timing are separated and tested as crop-specific sensory inputs.","chapter":"Flavour control","version":"1.1","updated":"2026-07-26","table_of_contents":[{"id":"variables","label":"Light variables"},{"id":"design","label":"Experimental design"},{"id":"experimental-definition","label":"Required treatment definition"}],"html":"
In brief

How spectrum, PPFD, DLI, photoperiod and developmental timing are separated and tested as crop-specific sensory inputs.

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Light variables

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VariableRequired record
Spectrummeasured spectral photon distribution at plant positions
PPFDinstantaneous photon flux density and spatial map
DLIintegrated daily photons
Photoperiodon/off schedule and transitions
Far-redseparate 700–750 nm photon record
Timingdevelopmental stage and pre-harvest treatment duration
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Hydroponic Italian Large Leaf basil provides direct evidence that lighting quality can alter key aroma volatiles.

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Far-red photons can contribute to canopy photosynthesis when combined with shorter wavelengths, so FlavoRotor records them rather than reducing the light description to “red/blue percentages”.

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Experimental design

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To test a spectral effect, DLI, temperature, cultivar, nutrient formulation, plant age and harvest handling remain matched. A treatment is reported as measured photon distributions, not LED control percentages.

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Required treatment definition

A light treatment is fully specified only when spectrum, PPFD, DLI, photoperiod, fixture geometry, plant position, leaf temperature and treatment timing are recorded. Percent dimmer settings are device commands, not transferable biological units.

VariablePrimary measurementPotential response
Spectrumspectral photon distributionmorphology, volatile and secondary-metabolite profile
PPFDµmol·m⁻²·s⁻¹ at plant positionsinstantaneous photon exposure
DLImol·m⁻²·d⁻¹daily integrated exposure
Photoperiodhours per day and scheduledevelopment and circadian response
Leaf temperaturecontact or calibrated infrared measurementseparates optical and thermal effects
","text":"In brief How spectrum, PPFD, DLI, photoperiod and developmental timing are separated and tested as crop-specific sensory inputs. Light variables Variable Required record Spectrum measured spectral photon distribution at plant positions PPFD instantaneous photon flux density and spatial map DLI integrated daily photons Photoperiod on/off schedule and transitions Far-red separate 700–750 nm photon record Timing developmental stage and pre-harvest treatment duration Hydroponic Italian Large Leaf basil provides direct evidence that lighting quality can alter key aroma volatiles. [R01] Far-red photons can contribute to canopy photosynthesis when combined with shorter wavelengths, so FlavoRotor records them rather than reducing the light description to “red/blue percentages”. [R33] Experimental design To test a spectral effect, DLI, temperature, cultivar, nutrient formulation, plant age and harvest handling remain matched. A treatment is reported as measured photon distributions, not LED control percentages. Required treatment definition A light treatment is fully specified only when spectrum, PPFD, DLI, photoperiod, fixture geometry, plant position, leaf temperature and treatment timing are recorded. Percent dimmer settings are device commands, not transferable biological units. Variable Primary measurement Potential response Spectrum spectral photon distribution morphology, volatile and secondary-metabolite profile PPFD µmol·m⁻²·s⁻¹ at plant positions instantaneous photon exposure DLI mol·m⁻²·d⁻¹ daily integrated exposure Photoperiod hours per day and schedule development and circadian response Leaf temperature contact or calibrated infrared measurement separates optical and thermal effects","source_ids":["R01","R33"],"visuals":[],"sources":[{"id":"R01","authors":"Hammock, Hunter A.; Sams, Carl E.","year":2023,"title":"Variation in supplemental lighting quality influences key aroma volatiles in hydroponically grown 'Italian Large Leaf' basil","publication":"Frontiers in Plant Science","doi":"10.3389/fpls.2023.1184664","source_type":"peer-reviewed research","relevance":"Direct evidence that spectral treatment can modify volatile profiles in a named hydroponic basil cultivar.","verification":"Publisher, PubMed, ISO or official proceedings metadata checked 2026-07-26","url":"https://doi.org/10.3389/fpls.2023.1184664","verified_on":"2026-07-26","verification_status":"DOI METADATA CHECKED","verified_against":"Publisher, DOI landing page, PubMed or official repository where available"},{"id":"R33","authors":"Zhen, Shuyang; Bugbee, Bruce","year":2020,"title":"Far-red photons have equivalent efficiency to traditional photosynthetic photons: Implications for redefining photosynthetically active radiation","publication":"Plant, Cell & Environment, 43, 1259–1272","doi":"10.1111/pce.13730","source_type":"peer-reviewed research","relevance":"Supports measuring far-red as part of the photon environment and evaluating it in combination with shorter wavelengths.","verification":"Publisher metadata checked 2026-07-26","url":"https://doi.org/10.1111/pce.13730","verified_on":"2026-07-26","verification_status":"DOI METADATA CHECKED","verified_against":"Publisher, DOI landing page, PubMed or official repository where available"}]}