Yes I did change it but its not blue its Ion-Crystal which is a really bright yellow. The type of bulb is a 168 wedge bulb. They come in various styles of blue or you can get the yellow. They run about 24 bucks a twin pack my cost. If you dont mind changing it to the yellow, I will just give you the extra one that came in my pack. It looks really sweet. Here is a pic
Here is a link as well to the PIAA site showing all the different bulb styles.