If these are the Raxiom CCFL halo fogs:
Man oh man I had such an experience with these. Finally got it right on the 3rd pair. The pink and white wires that connect to the fogs themselves: DO NOT extend them and I found cutting them as short as possible made the CCFLs brighter (so mount the converter boxes close, I mounted mine on the backside of the headlights).
I also DO NOT recommend "t-taps" at all in any automotive application. They will eventually offer a weaker connection over time or no connection at all. Get a friend who knows how to soldier wires together. For these CCFLs, as you've read, need a short and secure connection to illuminate fully.
You also have a 2yr warranty and AM will send you a new pair to install first, then you can send yours back within 30 days.