Depending on the bulbs.... You would be happy replacing them to ATI bulbs. I running 3 blue+, and one aquablue special.... Gives me about a 14k look. Alot of ppl will toss in a purple plus...

I configured them like this:

Front:
Blue
blue
white
blue

I have a good link about t5s and configurations, I will see if I get on the computer later to post them...