Hi guys
From what I understand, using relay is much saver for your car. I sell HID kits.
I went to Korea few years ago. The company that make a lot of HID kits for other company ie. PIAx. They show me around how HID work and made. They are one of the few company in the world that who made both bulb and ballast. The information that I got from them is using relay. When you first turn on your HID, the ballast will tranfrom the car 12V to 20,000V to start the Xenon bulb within 1/2 of a sec. The second stage will be warm up stage, that may take up to 15 sec. You will see the bulb colour changing to brighter and more colour temperature ranging will see(4200k, 6000k or 8000k). The third stage will be the operation. on this stage, brightness and colour temperature should stay the same and the consumption should be 35W (Halogen bulb 55W).
The reason why to use relay is because the first stage. You want that 12V from the battery not from your car headlight plug. If the ballast have problem, that powerful volts may send back to your car headlight plug. Think what may happen!!!!. Even our eyes may see no difference between plug&play and using relay, use relay is what the pro. told me.
Sound like $60 is a little too cheap for me. A good set of HID kit (not made in China) will be wholesale around US$150 before shipping and import tax.
I saw a lot of China HID kit have ballast problem and plug problem. Make sure tape up all plug and connector with eletrical tape. You want all the connector waterproof.
I am not trying to sell any one a HID kit or anyone is wrong. I am just telling everyone the what I know. I am a MZ5 owner too, I just want all MZ5 driver are happer driver.