i figured out alot on my own as usual, there are several different types of bulbs but all use a similiar connector at the back of the bulb.

i currently have D2S which is meant for projectors, while D2R is better suited for non projectors (like my JDM one piecers).
Ebay has a bulb set of any temp you want for about $100 in either type, they also have bulbs with built-in H4 plates so they will fit 100% on their own in my JDM housings. right now i have the modded plates from the seller, but they will do fine for now.
Im also happy with the purple color...its REALLY purple, although i read that the whiter the color (lower color TEMP) is longer range, while the Purple (12k color temp) is the best to look at but it cuts off at a certain distance.

~kris