Set Driven Key

 For the rear lights i created a set driven key. Firstly i created another attribute for the control which would control the lights. then i created a set driven key and added the control as a driver and both of the lights as driven. Then I keyed the lights with the visibility off when the number in the new attribute of the control was 0 . Then i did the oposite by turning them on , changing the value to 1 and then keying them again