Hello, thank you for your feedback. We're sorry to hear that you are experiencing flicker with your 0-10V Diva Dimmer. This dimmer is designed to control 0-10v drivers and not line voltage LED's, make sure that you are using a proper 0-10V lighting load in order for this dimmer to function properly. Please see below spec sheet stating limitations of the DVSTV-453PH.
DVSTV-453PH Spec Sheet : https://assets.lutron.com/a/documents/369147.pdf
We hope that this helps! For further assistance, please feel free to call in 24/7 to 1-844-LUTRON1, or email us at Support@Lutron.com