Have already said that the best LED dimming is a simple PWM generator PWM dimming using the PWM dimming can be installed in the wall switch, and then use a potentiometer to control the PWM dimming ratio in order to achieve. To bright light switch off, then you need to add a pair of lines. It is not compatible with the original wall of the high efficiency led lighting switch leads. The lead of the led high bay lighting technology switch is only 2, you can while dimming can switch. This advantage is difficult to be compatible. But actually, truly the most commonly used dimming lamps table lamp or floor lamp dimmer switch are installed on the power cord is not a wall, that just do not care to take advantage of the wall of the two leads. In other words, the tone of the PWM alone can be directly applied to Dimmable high efficiency led lighting.
Taiwan has a company launched four sections called the EZ-Dimming GM6182 switch tone light of high efficiency led lighting would be a good program. Only the use of ordinary light switch on the wall will be able to achieve the dimming, the first time open for all light, the second on 60% brightness, third on 40% brightness, the fourth open for 20% brightness. The advantage of this system can use an ordinary wall switch dimming. And the power factor more than 0.92. Did not produce interfering signals into account. The disadvantage cannot be continuous dimming. There are operational high efficiency led lighting problems.