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Re: [APD] relative plant growing efficiency
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
http://www.advancedaquarist.com/
--
Jerry Baker
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