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Just for information I have this light on a 30cm cube doing a dry start. Tested PAR levels today without water and measures 45 - 50 at substrate level. I'll update this post when its filled with water and I've tested PAR again.
Bought from this site. UP PRO-Z 30cm 10x LED Hanging Plant Light...
I not sure this information is available. This is what I understand so far.
We use PAR to assess lighting for plants rather than lumens, lux etc. We see lumens and plants use PAR. What I am unable to find is the optimal PAR level for the average planted aquarium.
Light compensation points...
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