That particular brand has not had good reviews, from what I have read. It may not be a typical T5HO light. Typical T5HO lights can't be judged by watts per gallon. They light up the area under them to a pretty consistent light level, depending on how far the light is from the area where the intensity is measured, no matter how many gallons of water the tank can hold. A standard 75 gallon tank is 48"L x 18" D x 20" H, the same as a 55 gallon except more front to back depth. One single T5HO bulb can give enough light on a 55 gallon tank to grow just about anything. For the extra 5" in depth the 75 gallon tank has, a second T5HO light can give a more uniform intensity from front to back of the tank, but will also give significantly more intensity at the middle of the tank. For example, a 2 bulb Catalina fixture will give about 120 micromols of PAR in the center of the tank, and that is in the high end of high light intensity. But an Archaea 2 tube fixture gives about half of that - comparable to a one tube Tek Fixture. I suspect the Oddysea fixture would be no better than the Archaea fixture.
So, in my opinion, you can grow the plants you mentioned, with no problem, using just that Oddysea fixture, but with bulbs of no more than 10,000K color temperature. You might even need pressurized CO2 to avoid algae problems.