Conclusion:
I have (50 W) replaced all the old halogen lamps in the house against the sebson (5 W). The light itself I find very warm and pleasant. The illumination is good and like better than Halogen me. After 20 months now use not a single failure of the cast. 18 lamps should be recorded, even though some bulbs are switched on every day at least 10 hours continuously. As another pleasant side effect, I feel that no heat buildup is present. You can burn your fingers touch the bulb during operation without.
And the most beautiful: refund of 250 in the current billing ;-)