I have a 6 foot tank (red sea g2 750) that is to be a fowlr. It will have butterflies and angels, but maybe i will eventually decide to try some softies down the line. I was thinking of going with 3 AI prime 16hds on the 18' flex mounts, or 2 hydra 32s on the same mount. Which do you think would be better? I plan on having some fairly shy species in there, so the lights would only be on full power for a few hours around mid day with the lights ideally ramping up and down from sunrise to sunset. In Australia, the hydra option works out to be about $200 more expensive than 3 primes.