About the dimming switch, does it adjust the brightness of the lamp by regulating the voltage of the lamp or by adjusting the resistance?
LED need to use pulse width modulation (PWM) method to change the brightness, need special dimmers. Dimmer switch function, the knob counterclockwise spin round there are "developed", that is disconnected.
Generally dimmer switch can only be used to adjust the brightness of the incandescent light bulbs, like that kind of lamps and lanterns, its internal is composed of silicon controlled rectifier, because incandescent lamp can work in 0 ~ 220 v, only the brightness is different. And energy-saving lamps only between 180 ~ 240 v can normal light, fixed and brightness, this is determined by the circuit inside the energy-saving lamps.
Energy-saving lamps and belt that core ballasts that the brightness of the fluorescent lamp they almost is fixed, because is the mercury vapour inside the tubes, only voltage reach its gas breakdown voltage, that is to say, only two kinds of bright or not bright.
