This is what u/techieman33 recommended. I will have 2 of the 5050 LED Strips (5A12V Each) connected on each side of the stage (4 total). Will I need to buy 2 of these ? and if so what else will I need ?
There are lots of options available. Here is just one low priced example. http://www.amazon.com/TOMTOP-12V-24V-Channel-Decorder-Controller/dp/B00B42M3RG/ref=sr_1_1?ie=UTF8&qid=1438630591&sr=8-1&keywords=led+strip+dmx+controller
Those look to be basic tapes, so something like what /u/techieman33 posted would be the easiest way to get DMX control.
You'll need to cut the existing connector off the end of the tape and wired the RGB wires and ground to their respective terminals on the block, but it should be easy enough to identify which is which.