I have a total of three of these LED lamps for a week in use. In all three condensate has formed after a short time on the inside of the glass body. Osram attributes this to "non-optimal transport or storage conditions" back. All lamps are (not in the bathroom) exposed in the living area in operation and no increased moisture - the packages were not damaged. I therefore suspect rather emanations of water-based adhesives in the interior of the lamp. How far the humidity inside affects the life, of course I can not judge.
That being said, I agree with the other reviews. The lights work very well, also the vitreous inside is beautiful to look at and diffuses light excellently.
Addendum: Have the lamp exchanged for a new one, after a significant delay has set. Even with the new lamp, condensate forms. The problem therefore seems to be systematic.