Dimming with LED

Controllable lighting with dimmable LED drivers

Our DALI-2 and DALI LED driver offering is designed for energy efficient, long lasting and high quality professional lighting applications. Our DALI drivers can be controlled by any DALI network providing vast benefits of dimmable LED lighting to end-users. The portfolio has dimming drivers from 25 W to 150 W with various output and protection options.
iC LED drivers for Tunable White can be used with DALI Type 8 (Dt8) commands to control colour temperature and intensity, bringing the Human Centric Lighting where it is needed.
For independent dimmable LED lighting and tunable white control, Helvar’s Switch-Control and Switch-Control 2 enabled drivers provide a valuable option.

Dimming technologies

What are different dimming methods in LED drivers?

We have a passion for the best quality light output, and we’ve been developing dimming methods to reach those goals. Our latest DALI-2 drivers are using amplitude dimming technology for completely flicker-free LED dimming. Filtered dimming and hybrid dimming technologies combine different methods to reach steady dimming and quality of light. How the dimming methods differ from each other? How is amplitude dimming different from hybrid dimming?  Here you can study more about our solutions for the best quality dimming for different solutions.

Flicker-free amplitude dimming for highest quality LED dimming
Amplitude dimming is your choice, when you need absolute zero flickering in your LED lighting at the lowest dimming levels. Our DALI-2 drivers with amplitude dimming technology ensure visually flawless, safe LED lighting.

Helvar amplitude dimming* DALI-2 controllable LED drivers offer the best available technology for dimming the light output in an accurate and flicker-free way. Amplitude dimming implements technique for adjusting the DC supply for the LED modules stably all the way down to 1 %. This means visually flawless light output that does not pose any risk to human eyesight or camera recording applications, and naturally complying with e.g. IEEE 1789-2015 standard about minimising flicker. Amplitude dimming ensures constant light levels in all situations and lighting environments.

Dimming curve with amplitude dimming by Helvar

* also known as Constant Current Reduction, CCR


Unique filtered dimming feature
Filtered dimming is a combination of some best practises of two dimming methods. Our filtered dimming meets the IEEE 1789-2015 standard ensuring safe dimming at the full 1% to 100% dimming range without potential flicker-induced impairments.

Our filtered dimming technology takes the linear amplitude* dimming safely all the way down to 3%. From 3% to 1% the dimming is filtered, stabilizing output and decreasing the modulation index drastically. With these products you achieve extremely high quality light output even at the lowest dimming levels. This unique feature creates flicker-free, safe lighting according to IEEE 1789-2015 standard.  To meet even the highest standards for light quality, the modulation frequency between 1 % and 3 % dimming levels is as high as > 2 kHz.

Filtered dimming is combining best practises

* also known as Constant Current Reduction, CCR


Enhanced hybrid dimming technologies for better light quality
Helvar offers a selection of LED drivers with unique dimming capabilities to ensure safe, healthy and high quality lighting at the full 1% to 100% dimming range.

Helvar hybrid dimming products combine the best features from linear amplitude* dimming and from Pulse Width Modulation (PWM) dimming. Amplitude dimming is a very efficient technique for dimming the light output especially on higher range. On lower range, the hybrid dimming products implement high-frequency PWM dimming to ensure high quality dimming from 20 % down to 1 %. With our latest products, the dimming range from 10% to 20% performs on 8 kHz, and the dimming range from 1% to 20% on 1 kHz – 8 kHz, accordingly.

Hybrid dimming combines CCR + PWM dimming methods

* also known as Constant Current Reduction, CCR

Contact a Helvar specialist for more details


Helvar iC Product range for Tunable WhiteTunable White colour temperature control

Our iC LED drivers for Tunable White can be used with DALI Type 8 (Dt8) commands to control colour temperature and intensity, bringing the Human Centric Lighting where it is needed.

Click to read about Tunable White

Switch-Control 2 for easy lighting control

Helvar Switch-Control 2 dimmingOur Switch-Control 2 and first generation Switch-Control enabled LED drivers provide a valuable option for installations without DALI. Switch-Control drivers are directly connected to the mains switch, and can be managed to change dimming levels, and colour temperature, by simple retrievable switch.

Click for User Guide