11/26/2025
A How To DMX for Hospitality People:
Hi. The first time I climbed a ladder to fix a light was 1987. The first time I cleaned a grease trap wasn’t much later. Theater and hospitality have been my twin stages ever since.
In the past decade, I’ve watched caterers, venue managers, bar managers — holy cow, so many hospitality peers — dive into DMX‑controlled lighting. And almost all of them need a little help figuring out how to use them–which makes sense–these aren’t the lights I handled back in 1987.
So let’s clear the fog. I’ll walk you through what these lights are, how they talk to each other, and why you’re not crazy for thinking it should be easier.
Spoiler: it is easy.
DMX is just the language the little computer chips inside each light use to communicate with each other and with your controller. Cable them together and — congratulations — you’ve built a tiny computer network.
The big take-away here is that since it’s a tiny computer network, each cable needs to be firmly attached, and that “recommended” terminator at the end (no, not Ahnold) is actually required.
Enough gibberjabber. Let’s build a network together, step by step, from controller to terminator.
To start with the controller: There are a lot of options. If you don’t have one, I recommend a dedicated laptop running QLC+, an open‑source lighting program. You’ll need a DMX dongle, but the price point and reliability are solid.There are many other software based control options, so feel free to shop around.
You’ll also find inexpensive “All-In-One” controllers on Amazon. They all operate a little differently, but most follow similar patterns.Although I don’t necessarily recommend them there’s nothing wrong with using one.
Whatever controller you choose, you’ll need to spend some time learning it (QLC+ walkthrough), (Generic Controller walkthrough). Once you’ve got the basics down, programming usually takes about 15 minutes per light.
From there, your DMX cable starts at the controller. Most cables are 3‑pin, though some fixtures use 5‑pin. Adapters are cheap online.
Important: DMX cables are not audio cables. They look alike, but DMX requires 120‑ohm impedance. Mic cables might limp along short‑term, but they just aren’t built for the kind of signal complexity that DMX uses and they will cause signal problems.
Keep cable runs under 1,000 feet (4,000 max in theory). Beyond that, use a repeater or opto‑splitter.
Attach your DMX cable to your first fixture (DMX IN).
Each fixture needs its own power supply. Most lights can be daisy‑chained for power, but you’ll often need extension cords between them. Even though they’re low‑wattage, they still add up — so be mindful of how many you plug into a single circuit. Always check the fixture’s pass‑through rating and don’t overload the line. If you’ve blown a fuse you’ve plugged in too many.--re-balance your load and learn your lesson.
Now we need to set the light. Each fixture is different, but you’ll usually set two things:
Channel mode: This is how many features the light will use. Check the manual, but if you’re guessing, pick the lower option (e.g., 4 instead of 7). Press Mode until you see “CH” and choose the lowest number.
Address: This is the fixture’s “name” on the network. Each light needs a unique address, spaced by the number of channels the previous light uses.
Example: a 4‑channel parcan which is set to “1”, is followed by a 5‑channel fogger set to “5” (1+4, the previous address + the number of channels the parcan uses), then comes an 11‑channel mover set to “10” (5+5, the previous address + the number of channels the fogger uses), and the next light in the sequence would be set to “21” (10+11, the foggers address + the number of channels the mover uses). If addresses overlap, fixtures will misbehave.
Press Mode or Address until you see “A” or “D” and set it. (Some older fixtures may use DIP switches — a little series of switches which must be manually switched on. It is a slightly more complex method which requires a little math. This is a DIP-stick walkthrough that explains how to use DIP switches on DMX controlled lights.)
Remember: one DMX universe = 512 channels total, That’s also the highest address number your lights can use in any one universe. If you need more addresses, you will need additional universes. Many store-bought controllers, and most software controllers, have features to accommodate this. After setting, connect DMX Out to the next fixture’s DMX In with a cable and repeat this process with each of your fixtures.
The last thing to remember is to insert a decidedly non-Ahnold terminator into the “DMX Out” port of your last fixture. The Terminator is actually a 120 ohm resistor plug, Remember how I said this was a computer network? Well if you don’t put that terminator in the last instrument the signal (which is literal electrons) will bounce back from the end and travel backwards down the line causing mischief until it runs out of steam. The three most common reasons your lights work but are doing something funny are: an addressing issue (wrong number assigned somewhere), an XLR cable is in the mix (Amazon lied–they are not interchangeable) or a terminator isn’t in use.
Finally there’s no real industry standard outside of a handful of port and pin numbers. Every light and controller has quirks. That’s why the manual matters. If you don’t have the manual remember that in IT (who knew you were doing IT?) the internet is your best friend. Not only can you use the serial number on whatever fixture you have to find the manual, but in IT it’s all happened before, so ask your question and see if there isn’t a reddit on the subject or some other resource. We’re all in this together.
Good luck with your project. I hope you get rich in the endeavor. But regardless I hope you see how easy this really is. It’s just a matter of systematically plugging some stuff in, programming it a little bit, and then living your best life.
You’re gonna find a number of $5 PDF’s I’ve made to download to build an office manual for your equipment.
If you decide to use QLC+ make sure you head over to their site and leave them a few dollars as well–Massimo and a huge number of volunteer engineers and programmers have spent a decade building out one of the best, free, highly adaptable lighting programs out there.
Yours in illumination,
Nate the Great
natepresents.com
