The problems I’ve had were with QC. The lights them self (MF01 MF01S FT03) work fine. It’s just that there were problems with each when I received them. MF01 had a blue led. Mf01S has a screw on the driver ring which doesn’t go all the way in so when you unscrew the head it scrapes some metal off the body. Also the tailcap was a different shade of blue to the rest of the light. FT03 came with a broken glass. All of the three lights mentioned are made by Mateminco. I think your ones are made by a different company