I've been in a suspended ceiling lamp (self), in shelves installed this recessed spotlights (as an effect of light) and in two display cases. The installation succeeds generally very easily and quickly, the plug-in connections are standardized so that you can calmed cable extensions with sockets 5mm / 2,1mm buy it. The flat design I could see the 4W version of the radiator flush into two 18mm shelves sink (box spring I had removed because superfluous in this case) to drill without completely. On vases are placed, contributing to a super evening light mood ... The radiation angle is almost 180 °, resulting in a good illumination.
So strong buy recommendation, High brightness, large beam angles, very flat and easy to install.