Here's a video of it in action...

This is a extruded LED Batman sign I printed on my dual extruder... I took a JPEG of the Batman sign and traced it in Solidworks... I then extruded and filleted the Batman sign and saved it as its own STL to be used in dual extrusion... I then designed a plate around the Batman sign, added holes for screws and save that as its own STL... Lastly, I design a shell to go around the plate and Batman sign, the shell has aligned screw holes so it can be fastened to the plate...

I then printed the shell in regular ole black PLA on my Rep 2... And I did the dual extrusion using the same black PLA for the plate and I used Bendlay (link below) to print the Batman sign... I used Bendlay because it is extremely translucent (91% of light passes through)...

I then hooked up an RGB LED strip, wrapped it around the inner shell and hooked it up to an IR receiver so it can be controlled with a remote...

Bendlay Link:
http://www.amazon.com/MatterHackers-BendLay-Filament-1-75mm-MakerBot/dp/B00K1NRCIY/ref=sr_1_1?ie=UTF8&qid=1435347958&sr=8-1&keywords=bendlay&pebp=1435347954416&perid=1WG2SRVP9TGP9WAM748W

I've also made the following logo's, designs for LED hookup...

Here's some links to other LED logos I made like this one...

Batman - https://www.youmagine.com/designs/batman-led-light-nightlight

Superman - https://www.youmagine.com/designs/superman-led-light-nightlight

IronMan - https://www.youmagine.com/designs/ironman-led-light-nighlight

SpiderMan - https://www.youmagine.com/designs/spiderman-led-light-nightlight

Punisher - https://www.youmagine.com/designs/punisher-led-light-nightlight

Storm Trooper - https://www.youmagine.com/designs/stormtrooper-led-light-nightlight

Transformers Autobot - https://www.youmagine.com/designs/autobot-transformers-led-nightlight-lamp

Transformers Decepticon - https://www.youmagine.com/designs/decepticon-transformers-led-nightlight-lamp

MakerFaire Robot - https://www.youmagine.com/designs/maker-faire-led-robot-sign-nightlight

Android Robot - https://www.youmagine.com/designs/android-robot-led-nightlight-lamp

Apple Logo - https://www.youmagine.com/designs/apple-logo-led-nightlight-lamp

Mortal Kombat - https://www.youmagine.com/designs/mortal-kombat-led-light-nightlight

Jeep Logo - https://www.youmagine.com/designs/jeep-emblem-led-light-nightlight