Welcome to the forum! There are a lot of great people here willing to lend a hand anytime. Often using the search feature (in the toolbar at the top of every page) will lead you to the answers you're looking for. If not, feel free to post a question in the appropriate area.
Please take a moment to view the information linked below my signature to get the most out of your iPad as well as our forum.
With respect to your question, the issue of light leakage is pretty much history since the glass is broken. That said, although broken screens are not covered under Apple's warranty, there are many, many accounts about Apple replacing iPad's with broken screens, etc. as a one-time favor. If you have an Apple store nearby I'd make a Genius appointment and throw yourself on their mercy. Odds are you will be pleasantly surprised. If there's no store nearby you could contact Apple Support directly and plead your case.
Hope that helps and let us know how it goes.
Welcome again and enjoy!
