Lighthouse Silhouette

I like the concept here and the composition is appealing too. The horizon is just the tiniest bit out of level (so minor that this in nit-picky, but always something to keep in mind) and needs a slight clockwise rotation. I like the blue tones in the water, but the blue sky is kind of plain. I think the image would work better with some color. I don't know where the sunset would be in relation to the lighthouse, but if it added color in the sky and on the structure, that would be a big bonus. You might find sunrise to be better if it provides better directional light.

Anyway, its a nice shot and IMO color would make it even better.