The LED lights work for me with a dimmer from Gera without problems. The dimming levels are not linear but rather in bigger steps, which does not bother me so. Two minor things are mE something ugly: - Compared to my Philips luminaires (2700 K) these lamps are much whiter. The course gives a curious picture. The description says that the lamps 2700-2800K exhibit. My guess is here rather 3200 K. - But more serious is that the response is significantly delayed. After activating the light switch pass already 1-2 seconds until the lamps. Also, do not go all the lamps at the same time, some bulbs need a little longer than others. The behavior I did not at the Philips lamps.
On the plus side is clearly the price. Hence the 4 stars.