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Unread 06/11/2018, 09:23 AM   #4
jda
Dogmatic Dinosaur
 
Join Date: Feb 2004
Location: Boulder, CO
Posts: 6,256
Do you have a PAR meter? What is "high light?" I can have bottlebrush under 750+ PAR of MH and they thrive and look great. This might be a quality thing and not a PAR thing. Even 400 PAR of LED can harm some trickier SPS where they can thrive in more than twice that of sunlight, MH or T5.


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