For the lights I made my own but you can buy a ready made kit from Emcotec (link below):
http://shop.rc-electronic.com/LIGHTI...catalog&p=2079
For mine I bought the Lexon lights from Emcotec, got a 10A Turnigy Receiver Controlled Switch from Hobby King for $6, and I used 2 x 5ohm, 20w resistors from my local electronic supplier.
Each wing gets a resistor, also I used a balsa /ply mount and used an Aluminium plate under the resistor with heat compound.
I am drawing 650mA per wing which is nothing really, using a 2 cell LiPo 3000mAh which lets me fly with lights on all day.
As far as the lights. I cut the skin of the wing and silicone them in place. Silicone absorbs any shock or vibration and it is super easy to remove the lights and replace them and re-silicone in place for any repairs. So far I have used this setup on different models with no issues.
If you want a nav lights etc, this method does not work of course, you need some form of light sequencer but for On/Off landing lights, this is perfect and cheap with very low maintenance and lasts forever.