the quality is good bought them this summer and tested them well they got extremely wet and switch them on and off because i did bunch of short trips less 10 miles
the only thing what did happen last November was blowing a Fuse when i got my heatedgrip + navi on charging my phone and high and low on and tried to restart te bike after i shut it down but it did that also before with the stock lights
4 H8 with slimballast the Ballast is nothing more then a convertor and fitting HID is the same as changing a lightbulb the HID bulb is connected to the ballast and the ballast you connect with a plug to the plug that connected the stock H1
here is a pic
extreme white on the rightside left in the pic and HID on the left side (right in the Pic)