Originally Posted by
randyc
The 6CL is designed for use with OTC, screw-in CFL & LED bulbs. There is a compatibility chart at lutron.com/led.
The 6NA is adaptive and can do forward or reverse phase control. If your LED has an electronic low voltage (ELV) driver you will need the 6NA.
The 6ND is a relatively new device which requires a neutral connection but may be a better option than the 6CL.
The RD-RD is a companion dimmer and only works with a master dimmer (6CL, 6NA, 6ND, etc.). It is used in the place of 3-way/4-way switches.
The RA2 dimmers offer true multi-location dimming so you won't necessarily need the Pico for 3-way/4-way control.
You can still add a Pico for control from locations where wiring does not exist. For example, you can put a Pico at the bedside to control the lights when there is only one switch at the door.
The R2S main repeater plugs into the network so its location is limited. You can add 1 wireless repeater for a larger footprint. R2S devices do communicate with each other but they do not relay or repeat signals.