Every LED pixel lighting project comes down to the same question sooner or later: how will the lights be told what to do? For bars, nightclubs, stages and live venues, the answer is almost always one of two protocols — DMX512 or Art-Net. They both do the same job, but they do it in very different ways, and choosing the wrong one can mean extra hardware, tangled cabling or a system that cannot grow with the venue.
This guide explains what each protocol is, where the real limits are, and how to choose between them for a pixel lighting project.
What Is DMX512?
DMX512 is the original workhorse of stage lighting. Developed in the 1980s, it is a digital communication standard that sends control data from a controller to lighting fixtures over a single cable, one universe at a time.
A DMX universe carries 512 channels of control data. Each channel is one value from 0 to 255 — for example, the brightness of one colour of one pixel. A single RGB pixel needs three channels (red, green and blue), so one DMX universe can drive a maximum of 170 RGB pixels (512 divided by 3, rounded down).
DMX512 runs over XLR cables in a daisy-chain: the controller connects to the first fixture, which connects to the next, and so on. It is simple, reliable and understood by every lighting technician in the world. Almost every stage fixture, dimmer and pixel controller on the market speaks DMX512.
What Is Art-Net?
Art-Net is a protocol that carries DMX data over a standard Ethernet network. Instead of one universe per cable, Art-Net can carry hundreds of universes over a single network cable, using ordinary network switches to distribute the signal.
Think of it this way: DMX512 is a single road with one lane. Art-Net is a motorway with hundreds of lanes running in parallel. The data inside is still DMX — the same 512 channels per universe — but the transport is Ethernet, which is far faster and far more scalable.
Art-Net is supported by all major lighting control software, including MADRIX, Resolume, TouchDesigner and MA Lighting, and by most professional LED controllers designed for pixel projects.
DMX512 vs Art-Net at a Glance
| DMX512 | Art-Net | |
|---|---|---|
| Transport | XLR cable, daisy-chain | Ethernet cable, network switch |
| Universes per cable | 1 | Up to 32,768 in theory (typically 100+ in practice) |
| Max RGB pixels per cable | 170 | Tens of thousands |
| Max cable run | About 300 metres per run | 100 metres per Ethernet segment (unlimited with switches) |
| Typical use | Small to medium installs, traditional stage fixtures | Large pixel projects, matrices, multi-zone venues |
| Hardware cost | Low — XLR cables and simple controllers | Moderate — needs a network switch and an Art-Net controller |
| Software support | Universal | All major pixel-mapping and media-server software |
Channel Limits and Pixel Counts
The channel limit is where the choice usually becomes obvious. Here is the maths:
- One DMX universe = 512 channels = 170 RGB pixels.
- A bar with 500 pixels needs 3 universes — doable with DMX, but already three separate cable runs.
- A 3D matrix with 5,000 pixels needs 30 universes. Running 30 DMX cables is impractical; a single Art-Net connection handles it easily.
- A large stage matrix with 20,000 pixels needs about 118 universes. This is Art-Net territory — DMX alone is not a realistic option.
The rule of thumb: if your project has fewer than 500 pixels, DMX512 is perfectly fine. Above 1,000 pixels, Art-Net saves so much cabling and hardware that it usually pays for itself. Between 500 and 1,000, either works — the decision comes down to the control software you plan to use.
When to Choose DMX512
DMX512 is the right choice when:
- The project is small. A single bar, a small stage or a DJ booth with a few hundred pixels does not need network infrastructure.
- You are using traditional fixtures alongside pixels. Moving heads, wash lights and strobes all speak DMX natively, so one protocol runs the whole rig.
- The operator is a DJ or a venue technician, not a lighting programmer. DMX controllers are simpler to operate and troubleshoot.
- Budget is tight. DMX hardware and cabling cost less, and there is no network switch to buy or configure.
When to Choose Art-Net
Art-Net is the right choice when:
- The pixel count is high. Anything above 1,000 pixels, and especially matrices, walls and ceilings of pixels.
- You want pixel mapping or video content. Software like MADRIX and Resolume outputs Art-Net natively, letting you play video across a pixel matrix as if it were a screen.
- The venue has multiple zones. Art-Net lets one control computer drive the bar, the dance floor, the facade and the VIP area over a single network.
- You need long cable runs. Ethernet with switches covers a large venue far more easily than daisy-chained XLR.
For a project like this, a dedicated Art-Net controller is the core of the system. Our Art-Net Controller 4-Port (AX-CT-ART4) is a good example: it receives Art-Net over Ethernet and outputs four DMX universes to the pixel fixtures, bridging the network world and the fixture world in one box.
Practical Advice for Bar and Stage Projects
Mixing both is normal. Many real installations use Art-Net from the control computer to the controllers, and DMX512 from the controllers to the fixtures. You do not have to pick one protocol for the whole venue — you pick the right one for each link in the chain.
Plan the universes before you buy. Count your pixels, divide by 170, and you have your universe count. Then choose a controller with enough outputs. Running out of universes mid-project is an expensive mistake.
Keep the network dedicated. If you use Art-Net, put the lighting on its own network switch, separate from the venue Wi-Fi and point-of-sale system. Lighting traffic is constant and time-sensitive; sharing a network with guest Wi-Fi is asking for dropouts.
Think about the operator. A bar owner who wants to press one button and have the lights change needs a simple DMX controller with presets. A nightclub with a VJ running Resolume needs Art-Net. Match the protocol to the person who will use it every night, not just to the pixel count.
The Bottom Line
DMX512 and Art-Net are not competitors — they are two layers of the same system. DMX512 is the language the fixtures speak. Art-Net is the highway that carries that language across a large venue. Small projects can stay on DMX512 alone. Large pixel projects need Art-Net to get the data where it has to go. And most real venues use both, with an LED controller bridging the two.
If you are planning a pixel lighting project and are unsure which controller fits, contact us with your pixel count and venue layout — we will help you work out the universe count and the right controller for it.