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34 Posts
Hello,
I'm modeling LED spectra & intensity for designing new lighting for my 200g. My goal is a full spectrum build using Luxeon M's, violet, blue, green, and far red (660 nm) LED's. I'm wondering how to calculate PAR for a given spectral output.
Right now, my spreadsheet gives me output in watts per nm. It's easy enough to go from watts at a specific wavelength to micromoles... I'm just wondering if there's a table of proportionalities/percentages for each wavelength of light (for instance, green wavelength is less efficient, so do I multiply the micromoles at 510 nm by 0.50?)
And yes, I know all about action spectra and stuff. In my real life I teach spectroscopy.
Thanks much!
I'm modeling LED spectra & intensity for designing new lighting for my 200g. My goal is a full spectrum build using Luxeon M's, violet, blue, green, and far red (660 nm) LED's. I'm wondering how to calculate PAR for a given spectral output.
Right now, my spreadsheet gives me output in watts per nm. It's easy enough to go from watts at a specific wavelength to micromoles... I'm just wondering if there's a table of proportionalities/percentages for each wavelength of light (for instance, green wavelength is less efficient, so do I multiply the micromoles at 510 nm by 0.50?)
And yes, I know all about action spectra and stuff. In my real life I teach spectroscopy.
Thanks much!
