You can clone two of the same type of input device by using the following undocumented method:
- Factory reset the remotes (press pair 4x within 5 sec).
- Pair one remote to a bulb (this may not be necessary, but I did this)
- Hold the remotes next to each other, press both pair buttons for 10 sec. LEDs on the front come on, then flicker off.
- Observe both remotes control the 1st bulb.
You can add additional lights with the following additional steps:
- Pair one remote to a 2nd bulb.
- Observe both remotes control both bulbs.