What struck me: While the other quartz glass bulb of one piece was Berlan has glued a glass vial in a plastic receptacle. Of course also holds, but the glue is already crumbles, the plastic spacers on the UV lamp to the inside of the bulb is extremely brittle after one year and breaks with a light touch. The UV radiation makes plastic and each adhesive brittle, here the life is so limited life (planned wear?). Whether the glass bulb really consists of especially UV transmitting quartz glass, I can not consider the new device I pay in any case attention to proper quartz glass.
When Berlan light filters the UV lamp does not start electronically, but a thick Balla transformer, which is close to the plug in the cable. So start with flickering fluorescent lamps. This device should therefore never be operated with a timer or start often shortened my knowledge the life of the expensive UV lamp that.
I put a photo of the device under customer photographs, because the ballast transformer is at Berlan (and many others) can not be seen.