Amongst the issues of LED lights dimmability is probably the latest challenges still yet to be fully solved. Dimming LEDs is theoretically easy, because analogue dimming, this is the adjustment of current, has long been an alternative. However, this process only works safely when used in combination with one LED bulb. Systems of LEDs demand a more sophisticated way of dimming. The two basic types of dimming are the PWM or Pulse-Width-Modulation and the analogue dimming, each of which are switched-mode regulators. Both of these types are similar in the sense that they both control the time-averaged current through the diode.
Analogue dimming is an extremely simple way of dimming, this is the adjustment of cycle-by-cycle from the LED Driver current regulated having a potentiometer. The current is adjusted for the LED increasing and decreasing its intensity.
The disadvantage of analogue dimming is that it only works safe as long as we dim a single light bulb. Systems of Leds demand a more refined technique. The issue of dimming a system of Leds is that there are various types of LEDs, requiring various ways for dimming. When there is a method of lights we would like to dim, the many LEDs may react diversely to the equivalent amount of current, and as the current is reduced some LEDs can switch off later or sooner than others. Also, analogue dimming largely changes the colour in the light, similarly to when it is used with incandescent lights.
The most frequently used manner of dimming LEDs is Pulse-Width Modulation, that is simply the cutting from the phase with a certain frequency. PWM switches the devices between fully on and fully off at a frequency that should not be told by the eye, therefore LEDA Driver 12v always run on the forward current recommended. The frequency of switching determines the brightness of light, and so the longer the lighting is “on” the brighter the light will be. This is the same technique found in incandescent light dimmers as well, other than incandescent lights respond to current more slowly, and thus need a different frequency.
Two kinds of Pulse-With Modulation signals are utilized often with dimming light: the leading-edge and also the trailing edge techniques. Those two are not the same ways of cutting the phase, and bring about separate dimming technologies. By far the most frequently used dimmers of LEDs use solely the leading-edge technology. Dimmers marked as R or RL are compatible with most dimmable LEDs, because they work with the leading edge technology and never include electronic transformers. TRIAC drivers, or devices governed from the DMX and digital addressable lighting interface (DALI) protocols and, down the road, may include wireless (RF) as a control option, which is dimmers that turn or slide with a knob, all work with dimmable LEDs.
Alas leading edge technologies controlled having a touch or push button, tend to be powered by an electrical transformer, excluding many dimmable LEDs.
The other kind of phase-cutting strategy is trailing edge technique, usually used in MOSFET or perhaps is not suitable for the majority of dimmable LEDs. One of the latest inventions appearing on the industry is the RAIS lamp technology. RAIS lamps offer a higher amount of functionality and seem to work with all kinds of dimmers available on the market. However RAIS technology continues to be new, and its long-term effect on LEDs have not been fully tested. When they turn out to be trustworthy their application both domestically and commercially, can dwxakg to be considerably safer and simpler than previous dimmable LED lights’.
Within the ever-evolving technologies of LED lights, dimmable LEDs are still to get designed to further compatibility and much better performance. As there is no general rule for what dimmer LED Waterproof Power Supply might be appropriate for, always check the technical details with all the distributor. Implementation of LED lights with non-compatible dimmers might ruin the LEDs, and they are generally, right now, not the least expensive solution of lighting.