LED Dimming: Protocol Comparison Table

Comparison table of LED dimming protocols

Tool: which dimming protocol to choose

PWM: the most common dimming method

PWM (Pulse Width Modulation) is the most widespread dimming method in residential and light-commercial LED installations. It works by modulating the signal duty cycle: at full power, current flows 100% of the time; at 50%, it flows only half the cycle; at 0%, it never flows. The modulation frequency determines whether flickering is perceptible.

DALI: the standard for professional lighting

The DALI (Digital Addressable Lighting Interface) protocol, defined by IEC 62386, is today the reference standard for professional lighting in commercial buildings, hotels, and public spaces. Its main features include:

Individual addressing: each DALI driver has a unique address (0–63) on the bus, so it can be controlled individually or in groups. A single DALI bus can manage 64 independent devices;

Logarithmic curve: dimming follows a curve that replicates the human eye's response, making transitions extremely smooth and "natural";

Feedback: unlike PWM and 0-10V, DALI is bidirectional: the controller can query each device to check its status, diagnose faults, and obtain consumption information;

Stored scenes: each driver can store up to 16 lighting scenes, activated with a single command.

DMX512: the entertainment industry standard

The DMX512 (Digital Multiplex) protocol was created in 1986 for controlling stage lighting and remains today the entertainment industry standard. Each DMX universe has 512 channels, each with 256 levels (0–255). DMX decoders receive the signal and convert it to PWM outputs for LED strips.

DMX is unidirectional in its basic version (RDM, Remote Device Management, adds optional feedback), but guarantees an update rate of approximately 40 frames per second, sufficient for fluid, synchronized visual effects. It is the protocol of choice for dynamic architectural installations, illuminated facades, events, and stage design.

Wireless: WiFi, Zigbee, RF, Bluetooth compared

Skydance controller compatibility — Protocol table

FAQ on LED dimming

What is the best dimming method to avoid flickering?

High-frequency PWM dimming (≥1000Hz) is most effective at eliminating flicker. DALI implements a logarithmic curve ensuring smooth transitions. Analog 0-10V dimming may exhibit flickering at low intensities if the power supply is not of high quality.

DALI vs DMX: what's the difference?

DALI is a bidirectional protocol for professional fixed lighting, with individual addressing and a logarithmic curve. DMX512 is unidirectional, designed for stage lighting, with 512 channels per universe and fast update rates for dynamic effects.

Can I dim using a standard 230V wall dimmer?

Only with a TRIAC-compatible LED driver. The TRIAC anti-flicker driver converts the wall dimmer signal to a PWM signal for the strip. A 230V dimmer cannot be connected directly to a low-voltage LED strip.

Products for dimming

→ Skydance controllers and dimmers — RF, WiFi, Bluetooth, Zigbee, DMX, DALI
→ Dimmable power supplies — 0-10V, DALI, with integrated dimmer
→ Power supply with integrated dimmer — 2-in-1 solution for compact installations