Anyone have any idea why this is happening? I am on PC.

Any light source will turn my whole screen bright yellow - cannot see anything..... unplayable game.

There is a hardware and software forum for reporting bugs, probably get better information there.

Similar effect happened to me when going underwater, was completely blind underwater, save a blue-ish green screen.

I fixed it by going to the Skyrim directory folder and deleting the d3d9.dll

Might work for you.

please post in hardware/software forum. Thanks