I read in a previous review that these lamps are dimmable. I took the test and could not agree more. The lowest dimming level is not comparable to halogen, the LEDs are logically a little brighter. Have to say that I have not replaced the halogen transformer and had to remain a halogen lamp in the train. When changing all halogen bulbs I came under the min. Performance of transformer and it was dark in the room. The maximum brightness of the LEDs is indistinguishable from the halogen lamps in my opinion, they merely act a bit whiter. My wife is the replacement but have not yet noticed, and the lamps are fitted in the bathroom. If a woman does not notice when dressing and make-up the difference, it can certainly not be serious. Also convinced the quality of the product, the LEDs just fit in the recessed spotlights how skillful retire halogen lamps. A flicker I can not tell yet, the small parts are fully in my expectations. What, as always stays with LEDs, now only to be seen is the rated life of 35,000 hours to be seen. But according to previous experience would and I will also draw the future back to this brand.