Let me check with my husband before I say for sure, but I'm thinking that provided you have rockwork built high enough and strategiacally choose & place your corals when adding them, yes... I'm pretty sure that's enough.
I'll stop back in later tonight after I've had a chance to pick his brain for you.
Remember though, your lighting requirements are still going to vary somewhat depending on what animals are in the tank. Different corals need different levels of lighting, and a 150 isn't going to be deep enough to provide low enough lighting for certain things with that fixture. One option is to provide shade using rock structure, another is to vary the lighting in the tank, using a weaker light in front of or behind a stronger one.