What would cause both headlights to go out at the same time (HD lights)? on 2006 Infiniti M35

What would cause both headlights to go out at the same time?
(HD Lights)high beams work.

Was told I need to have whole system replaced, which includes
bulbs,ballast,etc

Get Your Car Fixed at a RepairPal Certified Shop.
We certify shops based on expertise, quality work, and verified customer reviews
1 answer
its ur ballast but just buy the ballast and the start up wire because that loses power too...