These lights are specifically designed to be red chaser lights just like KITT. They fit perfectly in proportion with Base F for making KITT. They come with a battery box that requires four AA batteries and all you need to do to assemble this kit is add batteries and place the battery wires underneath the two screws that are provided. Watch Dawn's tutorial for more information.
 
These are the Lights ONLY. You can purchase the KITT Car Cake structure kit here: https://www.dinkydoodle.co.uk/product-page/kitt-knight-rider-car-cake-kit