Can't really use total wattage. For example using 300 x 1/2 watt (150 watts) LEDs isn't going to sustain many corals where as the same 150 watts using 50 x 3 watt LEDs may bleach your corals if you aren't careful.
Other things to consider are whether optics are used to focus the light and if so what degree of optics (40, 60, 80, etc) you choose will also impact what to go with. Most recommend fixtures or DIY setups using 3 watt Cree bulbs. Even amongst Cree bulbs there are many to choose from and more bulbs are coming out daily. Despite the 3W bulb claims I know of several tanks around here using fixtures that include 1W bulbs and those tanks are doing very well.
With a breeder you also have the added advantage of a shallow tank depth. At this stage it's more about what you are willing to spend or if you are willing to do a DIY fixture.