Interestingly, there are two ready-assembled cable harnesses in the set, and once again 50-80-80cm 50-80cm. That is, centrally installed from the transformer starting, you can bet a maximum of approximately every 80 cm (= 4m total distance) a radiator, then looks at the emitter-inserting the cable a bit out of the opening. The harnesses are looped over plug on, the spotlight will be put on each 10cm cable and a corresponding counterpart. The transformer is very small and shallow (120x40x20mm) and also fits into false ceilings with little air (and for example by one of the 64mm radiator-mounting holes).
Opening the radiator to exchange the bulbs just works, the product name-clack meets thus actually (a pear exchange is without skill easy to master). Swiveling is however nothing, so the light emitter goes directly downward. As for the durability, I had a similar Paulmann set more than 15 years of service, until gradually the radiator (glass) and have now adopted the transformer.