Summary

Designed and made a LED light that attaches to my Swag on a Velcro tab. Sourced the electric components from Jaycar for about $14.00. Is still a work in progress and I have included all versions of the STL files. The second version of the parts are the most current (I am still working out tolerances for friction fits with the printers I am using).
Contact me if you want source files etc.
Thanks Neil.

Instructions

You need to buy the following form Jaycar:
LED board - http://www.jaycar.com.au/productView.asp?ID=ZD0587
Mini Toggle Switch - http://www.jaycar.com.au/productView.asp?ID=ST0335
9V Battery Terminal - http://www.jaycar.com.au/productView.asp?ID=PH9232

You will need the following equipment:

soldering iron
small gauge wiring
heat shrink
wire strippers
small piece of acrylic (I just used scrap and sanded it until it fitted)
paddle pop stick

Steps to build:

Print both body and lid files.
Solder electronics in simple circuit.
Install in box.
Go camping.

Print Settings:
Printed on a UP 2
25% fill
0.25mm layers
Support

Issues I have noticed:

When I printed the light body out the first time I forgot to cut a notch in-between the LED section and the battery section for the wiring to fit through.
The LED board was moving a little once everything was installing in the body. i just pushed a small piece of paddle pop stick behind the LED board to stop the movement.

ARB Double SkyDome Swag LED Light