In addition, the spots are very bright (brighter than expected).
As for the measurement problem, I can describe many here say the following.
The spots are produced with me 1-2 mm from the lampshade. But does not disturb us through the beautiful simple design of the spots.
Price / Performance Top!
In the affordable range (> 15), there is in my opinion no better LED spots.
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BSW. the Philips 15 give an unnatural light, which I find very unpleasant.