These will have similar output and color temperature as 6000k HIDs, but they run significantly cooler and are a very reliable alternative. Many of the universal HID kits you see on ebay and such will have issues firing up and also run very hot. In a small housing like with these fog lights, that can often times lead to melting the housing. I have ran this brand in my Roush, and they have been great. I've tried various HID kits in the past, and prefer these for reliability.