When the package arrived it was mangled and upon inspection one didn't work at all so I had to return it to Thailand at my expense (not happy about that since it was defective upon arrival- haven't received a credit yet nor the replacement) I wanted to have another delivered BY CHRISTMAS but apparently that isn't happening because I have received no response. Today one of our employees brought his back because it wasn't working. Our Engineer looked at the headlamp and discovered that the wires in the control box were not properly soldered. He was able to solder the wire (the red wire wasn't connected at all) on the circuit board and it is now working. Pretty poor quality when 2 out of 7 aren't working.. its possible more will have issues but at least we now know we can possibly repair them if it is the solder problem. Just not acceptable when I paid full price for these headlamps. Too much trouble.