How should I whiten my neck (body)?

I wish my face would get brighter with whitening, but

I'm more worried about my body than my face.

My body tone is darker than my face.

So, I'm worried because the difference in tone becomes more noticeable when I wear makeup.

Should I just apply the whitening cream I use on my face to my neck as well?

I want my arms and legs to get brighter, not just my neck.

Since the area is large, expensive facial whitening products are a burden.

Shall we try applying an affordable yet effective whitening product?

Or do you have a whitening cream for the body?

I looked it up and found there are many whitening creams that make your skin look bright like BB cream.

Is there a body whitening cream that actually brightens the skin?