DMX512 vs DALI vs 0-10V — Choosing the Right Control Protocol

DMX512 — The Outdoor Architectural Standard

DMX512 transmits 512 channels of data on a single cable at 250 kbps, each channel carrying a value from 0 to 255 — typically one colour channel of one fixture. A typical RGBW fixture uses 4 channels (R, G, B, W), so one DMX universe controls 128 RGBW fixtures. For large installations — a 200-metre bridge, a large commercial facade — multiple universes are managed from a central controller that sends programming sequences to every fixture simultaneously.

The standard specifies a maximum cable run of approximately 300 metres per universe before signal degradation risk increases. For longer spans, DMX512 signal amplifiers (repeaters or boosters) regenerate the signal at intervals. TPK supplies amplifiers as part of complete system packages; the count and positioning are calculated in the project system design.

DALI — When Building Intelligence Matters More Than Colour

DALI (Digital Addressable Lighting Interface) is the standard for intelligent building lighting control. Its key difference from DMX512: DALI is bi-directional — a DALI fixture can report status, faults and energy consumption back to the controller, while DMX512 is one-directional. This feedback makes DALI the preferred choice for building interiors where energy management, fault monitoring and BMS integration are priorities — and less relevant for outdoor colour lighting, where dynamic colour programming matters more than energy reporting.

0-10V — When Simplicity Is the Right Answer

0-10V is an analogue dimming protocol: a simple 0–10 V signal controls the output of one LED driver. It is simple, inexpensive and reliable. But it has two significant limitations for architectural lighting: it controls brightness only (no RGBW colour), and it controls one zone per cable pair (no individual fixture addressing). For any project requiring colour or independent zone programming, 0-10V is not sufficient.

Full Protocol Comparison

Which Protocol Does TPK Use?

All TPK RGBW outdoor products — wall washers, linear lights, spotlights and stadium lights — are DMX512 compatible as standard. Static white products support 0-10V dimming. DALI versions are available on request for specific project requirements. For complete system design — universe layout, amplifier positioning, controller selection, wiring diagrams and programming documentation — TPK provides this as part of the project engineering consultation service.