Hello JoeCustomer & mar0bin,
We would not recommend attaching a LUT-MLC to a Caseta Wireless PD-6WCL forward phase dimmer. The LUT-MLC shunt capacitor is not meant to be used with forward phase dimming controls, and instead should only be used with neutral based dimmers and switches when experiencing LED Ghosting symptoms - when there is a minimal glow when the digital control is switched off.
In this case, we would advised to instead try to use the Caseta Wireless ELV + Phase Selectable dimmer, model number PD-5NE to see if it yields a better dimming performance that will not have the ghosting symptom.

For more on this product, please see our support site @ http://www.lutron.com/en-us/pages/su...ents&gqid=2537

Please don't hesitate to give us a call here at our 24/7 tech support line @ 1-888-Lutron1 (588-7661) to discuss further.

Hope this info helps!