Flares and Lightining Problems with Blender Objects

So I got a big lighthouse that I’ve made in blender and imported as a FBX to unity and I am currently having a problem where light flares and light in general is shinging through the object almost like it doesn’t recieve and cast shadows even though I believe it should. I have added mesh colliders to every part of it as that was the solution I found but doesnt work. Any ide?

Sun Shines on the Lighthouse

Lighthouse Seen from Behind

Flare shines through lighthouse

Light shine throuhg walls inside

Do your textures have some amount of alpha?

What sort of light is it you use?