Are you talking about the adjustment on the driver itself? If so, make sure your testing the current with a full string running. All of my drivers were set right at 1000mA when I tested them, I could turn them up to 1300mA if I wanted, but I left them at 1000mA. I wanted the driver to be able to do as much as the LED could safely handle even if I never used it, which I don't. My royal blues are 900mA, cool blues and cyan are 600mA, and my whites are only 350mA using the dimmer knobs.