This is the bulb I mentioned earlier discussed in a different thread 581 Twenty20 HF0 LED Indicator Bulbs - Anti Hyper Flash
What Is Hyper-Flashing?
Hyper-flashing or "rapid flashing" occurs when you change the technology for your car bulbs from halogen to LED. This is because LED bulbs use less power than standard halogen bulbs and this causes a drop in the circuit's resistance. When this happens, your bulbs will appear to flash really fast hence the name "hyper-flashing".
It's very frustrating when this happens and can cause drivers to panic.
How To Solve Hyper-Flashing?
Before this technology came around there was a very simple solution that most drivers used because it's classed as a "sure fix".
The best way to combat hyper-flashing is to buy an LED resistor kit where you put between the positive and negative wire of the LED bulb, creating a bridge between that raises the load for the entire circuit.
No More LED Resistors Required!
The time for "tapping wires" to fix your hyper-flashing LED's is well and truly over!
Twenty20 has implemented technology that's not only CAN-bus compatible but instead the 581 LED bulbs eliminate hyper-flashing all together.