Picture of Modular LED light
13, 9:25 PM.jpg
13, 9:25 PM.jpg
This is simply to show the basic idea of how to do it, i hope you will improve upon the idea to create larger and "cleaner" versions of what I've done here.

Step 1: Materials

Picture of Materials
materials are not specific and can be substituted, such as a row of LEDs can be substituted with 1.