I've mainly grown under MH (when electricity wasn't so much an issue) but since switched to LED's which are pretty pricey... it's fairly new to plant growing, but I've had success with combo of cool lights and warm ones and fixtures are much cheaper now. The light penetrates lower/deeper than fluors and is more even, and doesn't add much heat. (although heat may be good if you need the temp drop) If you're interested get as much lights on a strip as possible, and if you can't find cool, stick to warm, it's fairly close to warm flourescents. LED lights are particularly cheap at IKEA.
Fluor shoplights seem to work the best though for most low tech growers, i've grown plants fairly close to bulbs (at least 6"). I've even grown well under cfl, multiple fixtures so don't think what you have isn't potentially good long term. maybe add another fixture or two.
Everything should do fine, but maybe the catts, depends on what catts you're growing...?
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