In January 2013. mounted, already broken in September - supplier refuses to exchange the item or replace, as "Under the defects warranty, we exchange goods in the first 6 months of Then the burden of proof occurs So it's up to them to prove.. that the defect has existed from the beginning and is not caused by application errors. A replacement I refuse unfortunately. " (Quote) Thus, the specified minimum service life of 30,000 hours is (3.42 years of continuous operation!) A guaranteed feature, which is not right in the neck. So, better to buy a branded product, there is also a corresponding product warranty.