Electrical Troubleshooting Lights that Flicker or Dim Electrical Troubleshooting for Flickering Lights and Dim Light Problems The following are examples of common causes of dim or flickering lights that will be identified as you consider the following questions about the condition and occurrences. Common Causes of Flickering Lights | DoItYourself wwwyourself››Lighting Installation & RepairCommon Causes of Flickering Lights. Flickering lights in your home are a normal occurrence. In fact, the cause of flickering lights is usually benign. However, there are some instances in which this could be a symptom of a major electrical problem in your home, so it is important you know the differences between major and minor lighting issues.