Nah, not at all, but it really depends more on your inhabitants than any math formulas... You can have a lot of flow, and still have dead spots, just due to rockwork, tank dynamics, flow dynamics, etc., so really just look at your tank and see how it's responding. A good way to see how your entire tank is doing is to get some string and tie it to a stick, and put that in your tank in different places and see how well it's blowing. Find the dead spots and adjust from there.
Frogspawn or hammer will like slow flow that's not direct, and they prefer to have *some* randomness to it, but that's going to depend on your powerheads....
May need to get a better light, not now, just something to think about.