What size tank? I can't see all that fitting over a standard 4 foot tank. T5 reflectors are about 2.5" wide so you'll need 25" alone to fit 10 T5s side by side, then you still need to fit the halides which usually need at least 6".
As for too much light, I don't think it's too much. I run 2 250W 14K halides in lumenmax3 reflectors and 6 T5s half fiji and half 10K all with individual reflectors. All over my 120gal 3' cube. The T5 actinics won't add much light to the system so you're really talking about 4-6 T5s and 2 250W halides.
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