On cold filling of pressure containers the filling gas is cooled before introduction into the pressure container to be filled.

Energy Recovery up to 90% (PHE cold filling process).

In addition, inert gas and Hg are used, wherein the cold filling pressure of the inert gas is in the range of 4 bar to 8 bar.

Xenon and metal halides are arranged within the discharge vessel (1') which is embodied as a ceramic tube that has a uniform maximum inner diameter of 1.2 mm while the minimum cold filling pressure of the xenon amounts to 0.8 megapascal.