Car headlights are created separately from the car, with durable plastic and reflective aluminum for maximum efficiency. Manufacturers can alter certain features, but ease of changing the bulbs stay the same. | http://www.sciencechannel.com/tv-shows/how-its-made/#mkcpgn=ytda1 Watch full episodes: http://bit.ly/HowItsMadeFullEpisodes Subscribe to Science Channel: http://www.youtube.com/subscription_center?add_user=sciencechannel Check out SCI2 for infinitely awesome science videos. Every day. http://bit.ly/SCI2YT Download the