I've been using this relatively inexpensive dimmer a Busch-Jaeger 6523U replaced (psc = 1), since this did not get along with the Philips LED Retrofit, although this is recommended by Philips ... it has constantly flickered. The Unitec dimmer fits thanks to the included adapter Busch-Jaeger-series, that I could, etc. USING THE central disk, only the insert has been exchanged. The flickering is over! Every now and then changes in the maximum dimming the brightness of the LEDs "slowly", which is not perceived as flickering. If you turn the brightness slightly higher, too, is gone. I run the Philips 7W LEDs on this dimmer with Osram transformer (psc = 1).