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One of the most popularly-cited disadvantages of LED lamps in the past has been that you can't dim them.
Dimming an LED lamp is a very important thing to do, too, since adjusting the light intensity makes it actually comfortable.
An LED is not a pure resistive load, so these lamps have problems with dimmer switches - particularly older switches.
In 2010, researchers found that pairing an LED lamp with a typical residential dimmer switch caused the light to flicker 3.15 times per second (3.15 Hz), which is a frequency known to trigger a biological response.
There are the dimmable LED drivers on the market, which are just a specialised type of LED driver. An LED driver regulates the power to an LED device or a string of LEDs, supplying a constant amount.
The LED's energy needs are always changing due to temperature fluctuations, and they may get too hot without the proper driver.
This reduces the intensity of the light it gives out.
Because of how AC power works, there's always a small flicker as the power cuts out once per cycle.
Most people can't perceive this (only about 1% can, according to some figures), so it seems as though the light is constantly ON.
Ideally, the dimming flicker should be imperceptible: if the frequency of the ON/OFF cycle is fast enough, most people won't be able to see it.
The threshold is at around TK Hz.
Constant Current dimming is an effective way of dimming LEDs.
This method changes the current being supplied to the LED, and it's good for all LED lights, although dimming might change the colour output of older diodes.
There are a few LED drivers in the Sparks Direct store that are more than capable of dimming LED lights for various applications.
To give just two examples, we have the 18W single-channel Rako RLED18-1ACI constant current LED dimmer, and the 1-10W Aurora AU-LEDD3510CC LED dimmer.
As well as those two, there are many more in our LED lighting section.