RE: lights!
I one time built a supercub with a lighting system. I bought them from a company called rc-lights.com
I believe they had all kinds of pre made sets you can just add to your cart, or you can also contact them and design your own set. They are the "scalest" set of lights I have found on the market at a somewhat reasonable price. the one I custom ordered had 2 landing lights, a red and green wing tip light and a red strobe for the tale. Their kits actually come with a little control box that plugs into your reciever so you can turn the lights on or off from your transmitter. The lights are just LED's on the end of a wire, and you can also specify how long you want your wire leads if you have long or short wings or fuse.
David