12V LED is designed for 12V application with preset current at 20mA and current limiting control.  The operation current can be controlled within +/-10% in the range of 7V to 16V applied to LED. This is a very useful application when the power supply is from the typical 12V sources. The current limit control will give the LEDs in a stable and without spiking operation and yet long life time is achievable. For more info, please visit https://senslite.com.tw/Home/led/12v-limited-current-led/