3x the same lamp = 3 different colors

I treated myself 3 pieces of the Parathom in order to replace 50W halogen spotlights that had me anyway much too bright.
At the light output, there is nothing to complain about, the comparison with 35W halogen one can draw quite.
But the 3 lamps, all purchased together, have 3 slightly different colors of light.
One is quite warm white, as an ordinary light bulb, one I would rather classify as cold white and the 3rd is somewhere in between.
The already badly tarnishes the otherwise positive impression.

Edit: Here is a photo comparison of two lamps, which actually should be both warm white.
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