If you had a larger tank you could go with a non-photosynthetic stony coral (such as the tubastraea or 'sun coral'), in which case lighting would be a non-issue.
Though, the amount of feeding a sun coral would require would probably make maintaining water quality in such a small tank a real chor (for some reason the last word in that sentence gets censored if I spell it correctly, but anyway here's a pic of my sun coral)
