Another indicator is when the fluorescent lamps start to flash or whenever they’re not producing the light output, if they’re like 40% of the regular light output, then you need to change the ballasts. {“smallUrl”:“https://www. wikihow. com/images/thumb/0/03/Replace-the-Ballast-in-a-Fluorescent-Lighting-Fixture-Step-1. jpg/v4-460px-Replace-the-Ballast-in-a-Fluorescent-Lighting-Fixture-Step-1. jpg”,“bigUrl”:"/images/thumb/0/03/Replace-the-Ballast-in-a-Fluorescent-Lighting-Fixture-Step-1. jpg/aid2680-v4-728px-Replace-the-Ballast-in-a-Fluorescent-Lighting-Fixture-Step-1. jpg",“smallWidth”:460,“smallHeight”:307,“bigWidth”:728,“bigHeight”:486,“licensing”:"<div class="mw-parser-output">
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