Hi...i am a new user here. I had a similar Problem with my LED-Lights.Most of them are Pretty Cheap ones, and most of them Flicker a lot.So i built a litle Box to Plug in between my Lamps and Mains Outlet.Just a Simple rectifier and Electrolytic Capacitors and Ceramic Capacitors to Filter out all Riple.Use Big enough Capacitors to get rid of all Voltage Ripple, Size depending on what kind of Power your Lamp has.