Honestly it's a range of answers. I've seen both high and low light recommendations from coral vendors. the only one I recall specifically is that branching cyphastrea are a high light variety...
If you consider that they can eat food with their polyps, unlike SPS generally, then they don't necessarily need as much light as SPS. So I would just go medium light and base it off how their polyps and tentacles look. For their size, they are very expressive.