That should be a decent light for you. Lunar lights are typically LED lights that light up your tank at night. They're pretty much just for looks, but some will say that corals benefit from them.

The problem with everyone and 'starter' lights is that you will eventually upgrade to more lights, typically metal halide lighting, and then you're sitting there with other lights that you don't use any more.

If you know that you're not going to ever go for corals, that's a good light for you, and not a bad price either.

Eric