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Re: [APD] HPS, Lumens, and PAR

Jerry Baker wrote:
> Right, but with most bulbs that's all we get. So it's better than 
> guessing. It does correlate with PAR better than wattage alone does.

According to these people 
HPS emits about 19% more PAR than MH.

I believe those guys are pretty careful with their $$$ and plants ;)

Jerry Baker
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