and is very accommodating, after the first set of these bulbs has set the function after a few days, was sent with no problem a new set. Unfortunately, this set has the feature set even after a few days. Since I am an electronics I opened and looked up where the error is the article. Fact: production error, cold solder joints.
But because the provider can not do anything for. ... Rather spend my tip a few more Euros. The provider is already OK ...