Thanks for your help.
ps..the original post is below:
You dont' wanna put amber bulbs, because first of all it will look amber at night time just like as if you had amber on the corners ( it doesn't look like you have changed them) . Second if you put white, then at night time, the white looks a little amber, so it doesn't look all that.
I found these bulbs from nextcollection.com, they are
hyper white (blue color bulbs), at night time the bulbs look white, and when flashing it's even brighter. In my opinion that's the best setup I have ever seen.