Tip replacement for GU4 halogen spotlights

I have the spots easily inserted and the 12V AC transformer left in it first. Has directly working perfectly, no flickering, no humming. I have thus 20W Paulmann spots replaced with Paulmann transformer. Lately, I had despite adequate minimum load at AC transformer flicker and had more DC transformers retrofitted - with this bulb is not the case !! Have the bulbs directly or tried in other transformers and they fit anywhere! Exactly what you are looking for, now you just have to keep!
The narrow viewing angle leads to more commercial and less light scattering, which can (also his pictures better lighting for example, than the 120 degrees spot light) depending on the application.
First of strong buy recommendation.