Hello, thank you for your feedback. We're sorry to hear about your experience with your Caseta Plug-In Dimmer. One way you can help alleviate flickering is by adjusting the LED's dimming range--especially the low end of the range. Our dimmers feature a low-end adjustment, which you can use to do just that. Adjusting the range is easy; see page 114 in the following guide: https://webapiaw1proddat01st01.blob.core.windows.net/assets/documents/0301710_Caseta_Advanced_Instructions.pdf
We also suggest making sure your LED has been tested and approved by Lutron to provide the best dimming performance with your dimmer. There is currently no industry standard in LED manufacturing; since not all LEDs are designed the same, performance will vary with different dimmers. Because of this, we offer a mobile-friendly web tool to help you select LEDs that work best with Lutron dimmers. To use the tool, please visit lutron.com/ledfinder.
If you still have questions or concerns, please call us at 1-844-LUTRON1. We're here 24/7, so feel free to reach out, any time, day or night. You can also reach us via email us at support@lutron.com!