So we looked around for alternatives, and since I switch currently any lights in the house on LED (excluding Osram products) I checked if there is no such a lamp as LED. Unfortunately, so there's a lamp not yet from Osram, but presented here makes a reasonable impression that the light output is excellent, definitely brighter than a 15 watt light bulb and the light color is cozy pleasant.
We have with this lamp so a higher luminous efficiency, longer lifetime of the components thanks to lower heat generation and even save power. In winter, the runs anyway about 10 hours a day, which will therefore make a little noticeable.
We currently are very satisfied. Clear recommendation for the product.
CONCLUSION after the 1st winter season with some 14 hours burning time each day:
The first winter season would be over, the lamp has had its use partially 14 hours a day and neither the bulb nor the socket is broken.
Even at brightness the lamp has not lost, the light color has not changed.
I can wholeheartedly recommend the product so still.