When dimming lighting, there are different techniques that determine how the light level is adjusted. Two commonly used methods are leading edge (phase-cut) dimming and trailing edge dimming.

Leading edge dimming

When lighting is dimmed using the leading edge principle, the lamp can achieve the full dimming range of 0% to 100%. This means you can set the light to both fully dimmed and maximum brightness, offering maximum flexibility. This method is often used with traditional halogen or incandescent lamps.

Trailing edge dimming

With trailing edge dimming, the dimming range is limited. Lamps can usually only be dimmed to around 40% of their maximum brightness. This technique is often used with LED lighting and provides a smooth, flicker-free dimming experience, while protecting the electronic components of the lamp.

In short:

• Leading edge: full dimming range (0–100%), suitable for traditional lamps.

• Trailing edge: limited dimming range (up to approx. 40%), commonly used for LEDs to ensure optimal performance and lifespan.

Understanding which dimming technique your lighting supports allows you to choose the right dimmer and achieve optimal light control and ambience in your space.