A Pair (Driver side & Passenger side). Full Built-in LED included, no need extra bulbs.
Professional installation is highly recommended. States (except the PR AK HI GU AE). If it happens that the lights get moisture after you install them on your car, it would be normal for first time using.You just need to keep using for a period of days, the moisture will disappear. Because there is inner air cycling in the lights as we design.
As for headlights, you can also open the cover of low/high beam so that the moisture will out more quickly. If the moisture still exist, please feel free to send us message for help. We will try our best to help you.We will appreciate if you can takes some pictures or videos about your problem, and also send us the barcode of the products(every product we sell has a barcode on the backside of the light and outside of the package, it's very important for us to find the problem). If you open a request or case optionaly before communication, it would be hard for us to serve you. Or it would be hard for us to provide satisfying service for you.