What is the 2017 ford focus st headlight bulb size?

The low headlight bulb size on the 2017 Ford Focus ST is H11. If You want to know what the high beam bulb size is, then it is also H11. The fog light bulb size on Your vehicle is H8. The purpose of the headlight bulbs on Your vehicle is to illuminate the road ahead of You while driving. As soon as a bulb goes out, Your vision on the road can be greatly impaired and become dangerous. It's important that as soon as Your bulbs go out, that You replace them right away. Not replacing them on time can not only be hazardous but You risk getting a ticket from Your local law enforcement.