Hi, it looks like Ikea has improved their Tradfri LedBulbs but the ZHA support is very unstable (avoid them for now!).
The new codes are:
LED2109g6 for the e27 version
LED2111g6 for the e14 version
The “improvement” is in the led colors, these new bulbs are able to reproduce correctly the GREEN. They can create a bright REAL green.
But, in my setup, they don’t work correctly. After few minutes they blink and reset by theirselves. Even if you turn off, they turn on again xD
I returned LED2109g6 and replaced with an “old” g9 version, but I still have one LED2111g6 bulb, if someone needs some hardware codes and deepdiving it, I can help.