Review on TUINCYN BAU15S PY21W LED Bulb Amber CANBUS Free Turn Signal Lights 1156(150°) 12496 7507 2641A Anti Hyper Flash No Error Super Bright Blinker Replacement Bulb With Built-In Load Resistor(Pack Of 2) by Kaushik Hall

The lights are extremely bright, too bright for nighttime use in my opinion. but hey, they're for my motorcycle, so at least I know for sure they won't go unnoticed even in bright daylight. I installed them on all four corners and tested them one by one. no hyper-flash until I put the fourth one in. so I wound up having to buy an aftermarket flasher relay anyway to make these bulbs work properly. So, in the end, for my application I could have just gone with some cheaper LEDs without the built-in load resistors since I had to install an aftermarket flasher relay anyway.