Full Spectrum LED Grow Light | PhysioSpec Technology |
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Quality + Quantity

All living organisms utilize light in two ways: a source of energy to drive photosynthesis, and a source of information to drive photomorphogenesis and photoperiodism by targeting specific signal-transducing photoreceptors.

We develop spectral composition solely for photobiological responses.
We don’t design for visual acuity, and we don’t mimic the sun’s spectrum.
Tailored Photomorphogenic Responses.

Our wavelengths are tailored for particular photomorphogenic responses, photoperiodic signals, chlorophyll A and B absorption, xanthophyll carotenoid pigments, and anthocyanin accumulation in plant tissue – along with unknown photoreceptors – to name a few.

PhysioSpec horticulture lighting spectrum


The original. PhysioSpec is available with RAZR and designed for rapid root development and tight internode spacing for seedling and cutting propagation, along with full-cycle cultivation of leafy greens and microgreens.


As with all Fluence PhysioSpec spectra, PhysioSpec is a broad spectrum designed first and foremost with cultivation in mind, yet has the added benefit for an ideal research and cultivation environment.

PhysioSpec Indoor™

To create the most advanced spectrum for complete physiological plant growth, we had to challenge every assumption. Not only did this make the spectra better, it made it beautiful. Previously, 660nm (red) and 450nm (blue) were the most efficient LED packages, and coincided with peak Chl A and Chl B absorption areas. This led to a negligence of key photoreceptors and pigments outside this range.


PhysioSpec Indoor is a full-cycle spectrum optimized for rapid growth and complete plant development.  Tailored for growing plants from propagation to senescence (germination, clones/cuttings, mothers, vegetative and flowering applications) in indoor environments.  With a CRI rating of 85, PhysioSpec Indoor offers a beautiful work and research environment with vivid colors and greater contrast to study the health of your crop.

PhysioSpec grow light spectrum
PhysioSpec grow light spectrum

PhysioSpec Greenhouse™

Compared to PhysioSpec Indoor, PhysioSpec Greenhouse is enriched with a higher amount of blue photons in the 400-500nm range, which are used to offset plant stretch induced by the sun’s far red radiation. As an added bonus, PhysioSpec Greenhouse offers a world-class work and research environment with vivid colors and greater contrast to study the health of your crop.


With dual-peak spectrum at 450nm and 660nm, AnthoSpec is designed to provide rapid anthocyanin accumulation in plant tissue (i.e. purple lettuce coloration).  Based on the latest academic research, AnthoSpec is the most efficient spectrum for increasing anthocyanin production in plants.

AnthoSpec LED grow light spectrum
Fluence PfrSpec LED spectrum


With a peak spectrum at 730nm, PfrSpec™ is designed to exclusively target phytochrome far red photoreceptors. This spectrum is widely used to target Phytochrome Far Red (Pfr) in photomorphogenic lighting applications, and it is used to lengthen the dark period to encourage the flowering process in Short Day Plants.


With a peak spectrum at 660nm, PrSpec™ is designed to exclusively target phytochrome red photoreceptors. This spectrum is widely used to target Phytochrome Red (Pr) in photomorphogenic lighting applications, and it is used to delay flowering in short-day plants.

Fluence PrSpec LED spectrum
Fluence UVSpec LED spectrum


With a peak wavelength of 400nm, UVSpec™ is designed to provide beneficial photomorphogenic responses by creating a mild stress response in plants. As an example, when applied correctly, research shows increased THC content in cannabis plants. When applied incorrectly, research shows UV stress causes photoinhibition of chloroplasts, resulting in lower biomass production, photobleaching and death of leaves. 

See the difference

Browse our catalog of spectral power distribution charts to see how PhysioSpec compares to a few of the more prevalent grow lights being used today: ceramic metal halide (also known as light emitting ceramic or LEC), high pressure sodium (HPS), metal halide and T5 fluorescent.

T5 spectral chart
Metal Halide spectral chart
High Pressure Sodium spectral chart
Ceramic metal halide spectral chart
© Copyright 2018. Fluence Bioengineering, Inc. | Designed and Built In Austin, Texas


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