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Originally Posted by TheReefGeek
Im not so sure about a 175 MH being the same as a 2x96w, have any proof of this for us? The reading I have done suggests that MH can penetrate much better than PCs, regardless of watts.
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ya, at 20" of depth through water the PAR from my 175 was only 5% higher than the PAR from my twin 96 watt PC set up.
do a search and you will see all kinda of light testing I did about 3 or 4 years ago
Steve
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