Well they just released
•RRD-PRO-xx for RadioRA 2 and RA2 Select
"LED+ is the new phase dimming technology launched and shipping at CEDIA Expo. It provides the best compatibility with LED loads, but is also neutral-optional. A special inrush current monitoring system in each dimmer better manages turn-on of hungry capacitive electronic driver circuits. This is the new default dimmer for specification, budgeting, and to keep stock of."
But the real answer to your question lies here
[Link: lutron.com][Link: lutron.com]