This guide will explain how dimming works; how you can dim our dimmable led light bulb with either a 120V AC magnetic low voltage dimmer switch or a 12V DC dimmer switch; and which of our LED lights are dimmable and which are not.
The facts about dimming may seem complex at first, but if you understand a few terms, you’ll at least be able to locate the right switches and drivers for your LED light installation. Just as you don’t need to understand the chemistry behind caffeinated coffee or how coffee is decaffeinated, to order the right cup, you don’t need to be an electrical engineer to find the proper accessories for your LED lights.
A LITTLE THING CALLED PHASE CONTROL
There are four terms to know about led dimmable light bulb and, conveniently, they go in pairs. The first is “forward phase control”, which is a characteristic of “magnetic low voltage” power sources. The second is “reverse phase control”, and it’s a feature of “electronic low voltage” power. The “phase” in “phase control” just means the shape of the frequency of electricity. When a light is dimmed, it’s being turned on and off rapidly, 120 times per second. That means that, for 50% of a phase cycle, the light is on. “Forward phase control” means it’s on for the first half of the cycle, and “reverse phase control” means it’s on for the second half. That’s it! So if you have a dimmer switch with forward phase control, you need a 12V driver with the same phase.
Another term you’ll need to know is Pulse Width Modulation (PWM). Some dimmers reduce the actual voltage going into the LED fixture, which can damage the LED bulbs. A PWM dimmer instead chops up the steady 12V current, turning it rapidly off and on for different periods of time, depending on how dim the light should be. Our 12V Inline Dimmer Switch is a PWM dimmer, while 120V AC dimmers are not PWM.
www.led-strips.net. We are a professional manufacturer which engages in services of design, research, production, marketing of LED applied products. we continuously develop and create high-effective, energy-saving LED application products, such as LED Par, LED strips light, LED light controller, LED power supply and so on, in order to advance with times.
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