Don't worry about the lighting now! Just order the tail kit and dive in!
You can put off worrying about the lights until after you order your wing kit. Then, as was suggested, all you really ought to do is install the light brackets for the landing/taxi lights. (Tip: order one or two Duckworks kits along with your wing kit to avoid extra postage later.) I installed a Duckworks kit in one wing, and am fab'ing my own clone light bracket in the other wing. So, I do have one Halogen lamp on hand, but I will put off getting a lamp for the other wing, as I think I might go HID there (i.e. halogen taxi light and HID landing light).
But, I can put off the second light, as well as the nav lights/strobe for a while longer. Like the others, I have installed conduit in my wings to run wires to accept whatever I chose down the road.
One tip I learned too late: Before you rivet in the wing ribs, drill holes not only for the wing tip conduit, but also for an Angle of Attack tube that can run in parallel with the Van's pre-drilled pitot line in the left wing, and also drill holes for a conduit in the right wing for the wires for an autopilot servo. I didn't think to do that until too late, and drilling those holes now, with the top wing skin in place, is proving to be a challenge. (Might be easy for you guys with an angle drill and a short 7/16th inch 1/4-28 drill bit.) Oh, and be sure to get extra snap bushings. Van's give enough to run the pitot tube, but if you get the Safe Air AOA kit, they don't give you enough to get through all of the ribs.