9006/9005 LED anti-flickering harness + load resistor kits are used for fixing the malfunction of not light up for DRL, or DRL blinking on and off after installing the led bulbs for Toyota or for Lexus vehicles comes with stock high beam share the same bulb with DRL.
This kits usually are compatible with vehicles 2004-2010 Up Japanese vehicles like below 2010 Toyota, Lexus, Honda, Hyundai, etc.
For most vehicles, LED bulbs just plug and play, easy installation. For some European vehicles, extra LED resistors or decoders or DRL anti-flickering harness maybe required to avoid the flickering or error code.