Good illumination, but not interference suppressed (?)

These lights illuminate the room tidy. At exactly around the drilled holes have to unfortunately rework in the field of retaining springs, as these survive. This could be better solved because the trimming depending on the material can be cumbersome. In plasterboard then extends a knife, but when you have to cut wood. Therefore only 4 points.

Supplement for one year of operation:
Unfortunately, I have the items depreciate, now I have set up a radio in the room. After switching on the lights of the FM radio reception is disturbed by loud hissing. I wonder where the CE mark is. Are the lights with noise suppression?
So far I have received from the supplier no solution.
Therefore depreciation on 2 points.