Though LED light bars are built to withstand years of use, they will wear out over time and need to be replaced after a few years. Here are some common signs that you need a new LED light bar: Flickering or dimming Uneven light distribution Lights not turning on Varying brightness levels If you are running into any of these issues, it may be time to invest in a new LED bar. However, be sure to check for other potential causes such as poor electrical connections, improper installation, or a worn-out driver box.