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I ended up ordering 2x 24" dual T5 fixtures (Nova Extreme). They have parabolic reflectors, but don't have fans in them to increase the cost. Each comes with a 10K and an actinic, which I'll likely swap out with my full spectrums since I already have actinics. I think this was the best bang for my buck and I hope that I made the right decision. Either way I look at it I was about to spend almost $200 on lights, on either a ballast or a fixture.