What is it? I've googled it, and I've looked in the control booth Wiki (but neither really helped). I know this is a stupid question, but I've rigged lights, cut gels, and operated a board. I've never had to set a whole system up, or fix one. I'm assuming from what I've read that a DMX just carries the signal from the board to the dimmers. So is that right? Or am I making myself look more stupid? and Second: Ive ran lights at a club that were already set up. I didnt have to rig them or change gels out or anything, just the board. And now Im also doing some work at my schools theatre for band/choir/dance preformances. And I've noticed that where ever the lights are theres a chanel number with a 1 foot cable hanging down from there. And obviously you run the lights through there to the dimmer and yah. BUT, Ive noticed at some theatres they dont have that little box that drops the cables down. So do they hang lights where they need them and just run a REALLY long extention cable all the way to the dimmers? or is there another box they plug it in located in the center of the lights where they just run extentions to there and then run it to the dimmer? (sort of like what I thought a DMX was in the first question) I'm sorry for being annoying, I'm just intrigued!