Hello. I buy from you the first h7 led (non canbus) in 2017. I used with a pair of decoders (Philips) with no problem. In February one led lamp (left) some times turn off and the error in dash appeared. My thot is the time to change the lights (2017-2025). I order the q30 h7 kit, i installed and the error in dash keep. so maybe the decoders broken (Philips) so go to your website and make a second order with c20 decoder. The package arrived very quick i installed and the error is gone. BUT now have a big problem. Every time to turn signal left or right the lights drop power and flashing. This effect also make it when turn on fog lights (one flash), when go reverse the effect is on the voltage drop down. Now i waiting to have some money to order other decoder or maybe full canbus h7 led lights.