LED light fixtures can operate on either Constant Voltage (12VDC or 24VDC) or Constant Current (typically 350mA or 700mA).
If the above mentioned types are mixed, it’s highly likely that either the LED light fixture or the ballast will break. Breakage can occur immediately or within a few hours, depending on usage.
In LIMENTE light fixtures, external power supplies are typically 24V (24V has the advantage of less voltage loss when using longer power cords, when comparing with 12V systems) and fixed power supplies are 350mA or 700mA (e.g. ceiling light fixtures).