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Re: [APD] relative plant growing efficiency

Liz Wilhite wrote:
> I would happily settle for even "area under the curve" totals over the
> visible wavelength span.

I know that in terms of lumens per watt, HPS has everything else beat by 
a pretty wide margin. HPS bulb efficiency can be up around 140 lumens 
per watt while PC's are usually around 70 - 90 if I recall correctly.

Jerry Baker
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Aquatic-Plants at actwin_com