Over the past four years, I have purchased seven motion green bliss lights, five or operative and two are back ups. Over that period of time I have had to replace nine power supplies, some covered by warranty . We love the ambience and effects of the motion green bliss lights, and everyone that sees them loves them as well. And that’s the only reason that I continue to buy replacement power supply’s at $20 apiece. It’s time for me to order more. I have to have extras on hand, because I never know when one will go out. I wish they were more reliable.