How to get objects and mesh object vertices from camera view with Python in Blender 2.8 [duplicate]

Question

What I want to do

1. I want to change the power of only the light object visible in the camera view.
2. I want to remove vertices to mesh objects in visible in the camera view. Not remove mesh objects, only remove view vertices.

Question

1. How to get light objects visible in the camera view with Python.
2. How to get vertices in mesh objects visible in the camera view with Python.

Image

I want to get Only left light object.

I want to get Only inside camera view vertices

I can write Python but I'm not familiar with Blender. So I'm more glad if I can get it with a script.