We have the Sitra Cube in anthracite in our house in the outdoor area in use. And now 4 times. We are excited by the simplicity and beauty. Also the beam up and down, and the luminous efficiency are optimal for these rather small lamp. We have stocked the Cube with warm white LEDs and are completely satisfied. I only recommend the supplied dowels and screws against (unfortunately expensive) plugs and screws for the respective insulation of the house exchange. Otherwise holds the very serious Cube not really good.