DALI-2 certification program operated by the DALI Alliance has introduced additional methods to control the color output of light sources.
DALI-2 certification is built on open, international standards and is focused on device interoperability, backed by independent verification of test results.
“The combination of color control and the standardized DALI dimming curve provides a powerful tool for lighting designers and other users. DALI scenes allow recall and smooth fading of color as well as brightness,” says Paul Drosihn, DALI Alliance General Manager. “The new options for color control are an important addition to the DALI-2 program, and strengthen market confidence in the interoperable behavior of DALI lighting-control devices.”
As the leading globally standardized protocol for digital lighting control, DALI enables several alternative methods – known as color types – that can be used to control the color output of LEDs and other light sources.
The DALI Alliance has added DALI-2 tests for LED drivers and other control gear that use two color types, known as RGBWAF and xy. These DALI-2 options are now available alongside color type Tc (widely known as tunable white).
Color type RGBWAF allows simple control of up to 6 individual channels of color (red, green, blue, white, amber and free color).
For more sophisticated control, color type xy allows precise and repeatable selection of the color coordinates from the CIE color space chromaticity diagram. Color type Tc allows control of the correlated color temperature (CCT) along the black-body line, from warm white to cool white.
Color types Tc and xy allow calibration of the light-source and control-gear combination, enabling higher color accuracy.
DALI-2 certification requires the product to successfully pass a rigorous and comprehensive set of tests based on the international standard IEC 62386. The DALI Alliance independently verifies the test results, and then lists each certified product in its online product database, providing public traceability.
The DALI-2 tests for control gear with color control are developed and maintained by the DALI Alliance, based on Part 209 of IEC 62386. Control gear in Part 209 is also known as device type 8 (DT8).