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Re: [APD] relative plant growing efficiency
On 3/17/06, Jerry Baker <jerry at bakerweb_biz> wrote:
> Liz Wilhite wrote:
> > Any takers? Any guessers?
> You're looking for PAR (Photosynthetically Active Radiation) or PPFD
> (photosynthetic photon flux density) ratings. Each bulb/ballast
> combination is different, and the numbers are extremely difficult to
> come by for most bulbs. Sanjay Joshi tests a lot of MH bulbs for
Yeah, that is exactly what I am looking for and they seem to be danged hard
to find. Thanks for the pointer.
I would happily settle for even "area under the curve" totals over the
visible wavelength span.
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