Lighting For Nano
PC or MH lighting could be refitted to a larger canopy, for instance 2x24" PCs could be made to cover a 48" tank width. A 175W MH fixture could be converted to cover half of the same larger tank. But you might find you'll want to keep the nano, even after you get a larger tank. They are two very different worlds, each with its own attractions.
If you've searched this board and others for "lighting" or "metal halide" you know how many options and opinions there are out there.
Cheers,
Alan
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