light shining through screen

This is a classic case of internal screen de-lamination. This is physical defect, that can only be resolved by replacement of screen itself.

If you have an active AppleCare+ plan, Apple will likely offered an exchange for a refurbished iPad of the same model and specification. If out-of-warranty, or if you don’t have an active AppleCare plan, the cost of the exchange (if offered) will be c.60% of the “as new” price of the iPad.

You would be best advised to either visit your local Apple Store - or seek advice directly from Apple Support. The Contact Support link is at top-right of this page.

I hope you find this information to be helpful in identifying the fault and potential remedy.

Hello,

At any point was your iPad’s display replaced or removed (for a battery replacement)?

Can you post an image of what you are seeing so we can all see?

Does this ghost white light look like a white dot with a rectangle shape around it?