Leading edge dimmers: also known as dimmers,incandescent dimmers.Usual used for incandescent lamps or magnetic low voltage transformers,and produces a rush of voltage every half cycle,leads to a high inrush current into the electronic components of the LED lamp.

Many existing leading-edge dimmer switches have a relatively high minimum load, which often rules out their use with modest LED or CFL lighting circuits. However, leading-edge dimmers are by far the most common dimming control in existence.

Trailing-edge dimmers are more sophisticated than leading-edge dimmers. They provide a much smoother dimming control, absent of any buzzing noise, and is ideal for use in most premises.

Relative to the leading edge dimmer，A trailing-edge dimmer has a lower minimum load than leading-edge dimmers, making it a better choice for dimming modestly sized low-powered lighting circuits.

YSD 5 in 1Dimmable series High-end Dimmable Waterproof LED power supply can match with many dimmers and lighting system from all over the world,such as：Philips、Clipsal、Lutron、Leviton、 ABB、Crestron and so on；High compatibility and continous smooth&flicker-free with dimmers（Leading edge（Triac），Triailing edge（ELV）phase-cut.）