After approx. 8,000 operating hours they no longer generate sufficient UVC power. Then it is time to replace the lamps. Original Oase UVC replacement lamps guarantee you performance like on the first day. In addition, you will permanently secure the claims of the clear water guarantee. Supposedly cheap lamps from third-party suppliers often have different dimensions and do not fit into the lamp sockets or quartz glass. Or they only maintain the specified output for a very limited period of time. Such lamps can have unpredictable effects on UVC devices, especially ballasts and internal components. This UVC lamp has a power consumption of 11 W. Suitable among others for: Vitronic 11W, Filtral 5000, BioPress 10000, FiltoClear 6000, FiltoClear 11000, FiltoClear 15000, BioSmart 16000, BioSmart Set 14000, FiltoMatic CWS 3000/7000.