Very nice! Love the way you directed the light. I think the lighthouse might be a touch too bright taking into account the fact, that the moon is behind it and the viewer is looking against the light. in the high res though there is a white halo around the top of the lighthouse, maybe you want to remove that.

very cool composition author...IMHO color of the ground should be a bit more blue-ish cause color of the sky is dark blue and color of the water...Lighthouse "light" is fantastic...best of luck author