I have in February above UV lamp erstanden- of course you can expect for this price no big jumps and so I gave up on her, despite lasting "Wackekontakt" the UV tubes satisfied. Now, in the ca 5. Using seems to be a blown fuse in the unit, it smells scorched and nothing works! My attempts to contact the manufacturers have failed, thus lets the customer service left much to be desired.
My recommendation: drauflegen 5 euros more and buy a better quality equipment!