We are bringing the Powerspec Wanhao Duplicator i3 Plus to a trade show and we wanted to add some bling to it so we designed a carriage to hold a LED strip. Very easy to print with minimal support and fits right in. You will need to use a printer that's bigger than the Wanhao because it's bigger than the print bed--we looked at a design that could be printed in parts, but it was not secure and the LED strip moved around too much.
As an added bonus, there's also raised rings added to secure the springs so they don't slide around and create X/Y errors.
We used a simple LED strip from Amazon: USB - Powered LED Light Kit