Light color and brightness correspond to the impression by the 35W Halogenbirnchen with mirrors which previously put in the sockets. Now we have the same illumination of the corridor with 16.8 instead of 140 watts! As the old transformer is difficult to achieve under the ceiling panel, this has not yet been replaced, works fine. In sharp contrast to our kitchen, where two years ago 8 GU4 20W was changed in 35mm mirror against a LED variant with 1.8 Watt (LED replacement with more power was us then still too expensive). However, the 1.8 Watt load the outputs of the transformer is not sufficient so that often several times back off and must be switched on until all 8 LED mirror lights. These then produce but "felt" about three quarters of brightness as before the halogen bulbs ... The Ausschaltproblem will next year certainly do, because then pending a kitchen renovation and the ceiling panels can be removed for replacement of transformers.