Therefore, I have now (almost) all lamps replaced by this.
But a word of advice:
I had after I have used all the lights, a constant flickering of the lamps.
One should make sure that the dimmer used a very low minimum load has (approximately 20W at eg 4x6W series-halogen lamps), as failing to achieve the minimum load may be noticed as flickering or noise during dimming.
So I have a lamp, the lamps connected in series, left with a conventional 35W halogen bulb
and had to reach the minimum load my dimmer (50W with me = 4 x 6 watt LEDs + 1 x 35W halogen = 59 watts)
no flickering.
So by the remaining halogen lamp I have a direct comparison of LED and halogen in the color reproduction
and you hardly notice a difference.