The door lights are used to see the animatronics in Fazbear Entertainment. They shine a light down the West Hall and East Hall.
The lights will reveal Chica the Chicken on the right-hand side, and Bonnie the Bunny on the left-hand side. Freddy Fazbear and Foxy the Pirate Fox are not visible in the door lights.
The Right Door Light, with Chica the Chicken there.
The Left Door Light, with Bonnie the Bunny there.
Both Door Lights photoshopped.