Finally got round to having a play (very much like this shot Richie!)
I went for a simple approach and cropped it to remove the red bouy and then re-framing to give the lighthouse the presence.
I desaturated the lights on the island (told you I hated orange lights) and the purple around the highlight on the lighthouse.
Bumped the vibrance a little and upped the contrast.
I'm surprised you didn't get more cloud movement over 2.5 minutes, the sea looks great and too much movement in the sky would distract. Nice shot!