www.xerogear.com
Take a look at these lighting systems. Minnflyer and I have done several booth interviews with these guys and they have a pretty interesting product. The lights on the planes are bright enough to be seen in daylight.
However, I will throw in a word of caution. If you are still a new flyer you may want to stay away from this type of flying. Flying at night, or even at dusk, is a lot more difficult because seeing the orientation of the plane becomes much more difficult. It'll become easier to lose control of hte plane and crash. Just something to think about.
Ken