Do you need to buy the Morimotos bulbs to work in the projector house our will other brands work also.
Other brands work I just prefer their bulbs. More of a quality and customer service type of thing so I prefer to stick with them
You don't have to run a harness buts its cheap insurance so you don't fry your electrical system.
Projectors don't have wiring unless your referring to a Bi-Xenon projectors which you'll have a + and a - wire that you'll hook up if you want the high beam feature. It's up to you how you want to wire them...like if you want to hook it up to a switch etc or run it through the stock wiring if you have a 04+