This is your number one source for Apple IPhone 5 Lightning Adapter, Lightning Adapters by Apple and Third Party Versions
If you have any of these you will need a lightning adapter.
Some common questions for your IPhone and IPod equipment
Will I need to buy a lighting adapter when I buy an iPhone 5? Yes its is not included with the phone, if you want to use pre IPhone 5 accessories
I just purchased an IPhone speaker dock, will I need a lightning adapter? Yes (September 2012)
Is the lightning adapter better than the old style connecter. Yes its faster and much more efficient.
The lighting adapter is available direct from this website, you can purchase Apple and third party versions C/O Amazon by clicking the button below