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[APD] Re: Actinics and other things to darken (or lighten) your life

"The biggest problem wtih actinics is the lack of output, unless you'ave got too much light already, then swapping to an actining can help things seem to clean up."

Yeah, this is the effect I'm looking for. I've seen 'dark' tanks with actinics on them, so I guess my question is, is that big blue spike in the spectrum really growing anything in a freshwater planted tank? When you say 'lack of output' are you talking about visible brightness, or PAR (photoactive radiation)? I'm thinking now of not adding it, but replacing one of my 6700K or 5000K lamps so the overall effect would be darker in appearance, but still wanting to keep PAR at the same level.


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