Tips for mounting:
In the description of a 20mm hole is drilled.
I'd reconsider, because each lamp has 20mm diameter plus the three fishing hooks, and therein lies the problem.
With the hook you get the lamp impossible in a 20mm hole unless you turn very rough violence.
Therefore, I have two of each lamp of the three clips canceled (is wonderful) and lo and behold, with a remaining clip they go nicely tight into the wood.
(When mounted in thin-walled materials please the clips do not break, there they are needed and also hinder the installation failed).
In another review I read that the edges are very sharp.
That's right, so I have a 30mm Forstner drill a recess created.
Now the lamps are perfectly flush with the wood.
Even the lamps themselves: I am happy top, everything makes a really sophisticated look, the assembly is no mystery, and the parts do not stink like tons of other junk China.