In many cases, yes, SPS corals can survive in amazingly little light although spectrum undoubtedly plays a part, as does feeding. Many - not all - Pacific SPS corals (Acroporas, Montiporas, etc.) contain Clade C zooxanthellate and are less tolerant of high light than, say, Clade A zoox. But these myths about SPS requiring high light intensity (define this vague term, please) go back decades and simply isn't true. I can provide hard data if you're not already familiar with it.