Doesn't mean it covers wearable items like light bulbs.Ummm.... Warranty...??? I don't understand why everyone wants to do things like this themselves when it is such a difficult task and their car is under warranty.
Go to the dealership and tell them that the car that they sold you and said would be free of defects for at least 3 years / 30,000 miles... is defective. Either fix the defect or refund everything I paid.
Its that simple. You'll get your light fixed and won't have to worry about anything else.