Discount it at your own risk I guessThe water soluble light-harvesting complex of dinoflagellates, peridinin-chlorophyll protein (PCP), is remarkable in using the relatively polar carotenoid peridinin as its main chromophore
I definitely agree that improving spread, for example with LED bars is a good idea, but I would predict that the benefits from decreased shadowing will be much more prominent than improved micro-scale spectrum blending.All good points. I suspect this is why led light bars work better than led fixtures.
The leds are usually the same spectrum in a long row. Then you add another spectrum in another row, much like T5 bulbs.
Some have reflectors as well on each led.
Great discussion and I would say using light bars combined together, one spectrum per bar, would work better than say a Radion fixture that's trying to blend.
Intresting..Although the detailed ecological implications
remain to be investigated, we show here that corals
harbor complex light microenvironments that can now be
characterized at micrometer resolution under in situ
conditions. Such optical microniches show pronounced
spatiotemporal variation and differ strongly from the
incident underwater irradiance regime, in terms of both
intensity and spectral quality. The optical properties of
the surrounding benthos also affect local light fields and
photosynthesis in corals, and such interaction needs
further attention in coral photobiology studies.
For instance, a 4.4-fold decrease in ambient
scalar irradiance (from 1750 to 400 mmol photons m2/ s )
led to only a 2.4-fold decrease in scalar irradiance at the
polyp tissue (from 126 to 53 mmol photons m2/ s ;
CoralLIghtFieldIn situ spectral scalar irradiance at the upper surface of
faviid corals—Spectral scalar irradiance at the upper
surfaces of faviid corals (E 0 ) differed markedly from the
incident downwelling irradiance (E d ; Fig. 3). Depending on
the wavelength in the PAR region, the E 0 : Ed ratio varied
between 0.8 and 2.4, with the most pronounced enhance-
ment at wavelengths 500–640 nm and . 680 nm (Fig.
Approximately 40% of photosynthesis on earth occurs in aquatic environments, where autotrophic organisms form the base of the vast majority of food chains (1). Dinoflagellates are notable among aquatic photosynthetic eukaryotes for using predominately carotenoids over chlorophylls for light harvesting (2). This adaptation allows dinoflagellate lineages to use a larger range of photonic wavelengths to facilitate photosynthesis. PCP and the unrelated chloroplast membrane light-harvesting complex (LHC) mediate excitation energy transfer between associated pigments and reaction centers in the thylakoid membrane, driving photosynthesis (6).
You may want to consider this.That particular measurement came from this study:
Energy Transfer in Reconstituted Peridinin-Chlorophyll-Protein Complexes: Ensemble and Single-Molecule Spectroscopy StudiesWe combine ensemble and single-molecule spectroscopy to gain insight into the energy transfer between chlorophylls (Chls) in peridinin-chlorophyll-protein (PCP) complexes reconstituted with Chl a, Chl b, as well as both Chl a and Chl b. The main focus ...www.ncbi.nlm.nih.gov
But this is a general property of fluorescence processes. I'm not arguing that cyan / green isn't utilized, just that it's fundamentally going to be less efficiently utilized than wavelengths that can be directly absorbed. Even higher end LEDs will still use 450ish nm LEDs and PCP will absorb in that range almost as efficiently as in the cyan where its absorbance peak lies.
ε is the molar absorptivity coefficient that gives light absorbed by 1 mole of a molecule. This is measured in cm2/mole