I have now, over 60 sebson lamps in my house in use and has been quite satisfactory, although I unfortunately (especially the 9W "pear") fail due again had to send back already about 5% of the lamps used so far. I wanted to replace these lamps with my previously used 380lm warm white spotlight by offered here (500lm warm white lamps), to optimize the illumination of my billiard table. In short, I needed more light! Elsewhere were reported something that I could not believe, namely, that these lamps would not fit in the GU10 socket. Lo and behold, that was actually with me the problem! GU10 socket is too small. So I need me more than the light power to stop worrying, because I could not even screw in the bulbs. Fehlkonstruktion !!!