re: Red light ticket in BR. Do I have to pay it?

Check where the letters are coming from and ask yourself, "How can an outfit in 'Arizona'accept money for a broken law in Louisiana?" If you want to dispute it, you won't be doing it in a Baton Rouge court. It will be at a designated location with a board, not a judge, to review. Don't pay it. Ignore the letters. Don't even open them.