Special lamp for Spezialleuchten

We have this kind of special lamps for our stairwell lighting in use; the corresponding lights were acquired in a well-known Swedish furniture store, willing himself the related lamps (with their special sockets or plug sockets "G23") not to perform as "spare parts" or is capable of.
The use of the staircase (each controlled with motion sensors) is not ideal, because there are many switching commands and the switching capability of CFLs has its technical limits. Blame for the wear are thus not the lamps per se, but their use. Despite the "stress" in our stairwell every Osram compact fluorescent lamp Dulux keeps us estimated an average of three to four years before they first "sick reports" on different types before you light finally goes ... There are copies that are earlier "goodbye"; hold for "colleagues" from the same lot a little longer. I therefore recommend locations with little shifting.