If you are noticing that your outdoor sign is no longer working as it should, you might be wondering how to check fluorescent ballast on your own. Though spotting an issue with your sign is easy, it is best to leave diagnosing and repairing electrical concerns to a professional. We suggest you skip learning how to check ballast in fluorescent lights on your own and instead call a commercial or industrial electrician for support. Always keep your safety and the safety of your customers and employees in mind by having an electrician complete electrical work within and outside of your building.