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18,204 Posts
Is your tank 48.5x18.5x25ish?
You may not understand all the technical aspects but your best bet is to review the sticky in the Lighting subforum. Read as much as you can and pay close attention to the data for what's considered low, medium and high light. From that you'll know enough to make a decision.
In those sticky threads, there's tons of information about PAR data for various fixtures. From Finnex (a forum sponsor) to many others.
Since you likely want low light, it shouldn't be tough to find an affordable fixture.
You may not understand all the technical aspects but your best bet is to review the sticky in the Lighting subforum. Read as much as you can and pay close attention to the data for what's considered low, medium and high light. From that you'll know enough to make a decision.
In those sticky threads, there's tons of information about PAR data for various fixtures. From Finnex (a forum sponsor) to many others.
Since you likely want low light, it shouldn't be tough to find an affordable fixture.