What about the lighthouse is anomalous that makes it deserve an SCP designation? It's apparently just where this guy lives.
What you have currently is the "Superpowered humanoid" or "X-Man" concept. An SCP article is much more than simply an anomalous item, being, place, or event. The true meat of the SCP is the story around the anomalous thing. The thing itself is a vehicle that the narrative is attached to. To give my best example from Series 1, look at SCP 093: The anomalous item itself is a rock that turns mirrors into interdimensional portals. The thing that makes this SCP shine is the story; the history of the dimension that it leads to.
We need to know more than just "it's a really strong old man in a lighthouse." What story are you going to tell - How The Foundation found him, how and why does he have these powers, did someone use him to some end? Has THe Foundation been able to communicate with him? What is his personality, his motivations, his goals? (These are not all questions that must be answered, these are some possible narrative hooks.)
I also recommend reading a significant amount of the top-rated SCPs from the last several months, and focus on reading more recent SCPs rather than older series. Many early series SCPs would not last a day under current SCP standards, and a few are only still around because of their history with the wiki itself. (This does not apply to all early series SCPs, but many of these were written before the wiki's style had really been cemented.)
The anomalous entity, while important, is not actually the main focus of the SCP. A good story, a compelling narrative, something that makes the reader feel something - that is the goal of an SCP article. What feeling do you want to evoke from the reader? Horror? Empathy? Sadness? You need to create a narrative around this object and its effects.
I am not saying this to discourage you, I just want you to understand the amount of effort that goes into creating a successful SCP.
If you can revise this idea with a story that you want to tell, we will be able to give you much more meaningful and constructive critique.
The anomalous being is the vehicle, the narrative is the person driving, the readers are the passengers. You can have the shiniest, most polished, most interesting vehicle in the world, but without the driver, the passengers aren't going anywhere. Where is the narrative taking the readers, and how is it getting them there?
