Sign Ballasts
Keystone’s line of sign ballasts makes commercial sign maintenance simple. With only six ballasts that cover virtually all common plastic sign configurations, you’re sure to have the right ballast for the job.
All Keystone magnetic sign ballasts are designed to operate at a minimum starting
temperature of -20ºF, which is ideal for use in cold outdoor sign applications. With Keystone’s quality and dependability, you can count on your installation to last, maintenance-free, for years to come.
