"Pontec 57111" UVC replacement lamp, 7 Watt . This is the original and works so safely. 3 Watt is too little. Available e.g. at Conrad Order no.: 573009 - UP

The UV bulb is included. There are 2 electric cables. One for the pump, the other for the UV lamp. The connection piece at the water outlet has an outer diameter of 50mm. Hose, don't know.