I bought 3 sets and when I got them, I was THRILLED.  However, 2 weeks after I got them, all but 2 individual candles stopped working.  I only turned them on in the evening so it wasn't like I was using them for hours on end.  I am really disappointed in the quality.  If it were just one candle, I would not be upset, but since it was 7 out of 9, I think they are junk.  The are really beautiful when the work as the multiple colors are really great and vibrant.  I am just so upset that they didn't last.