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Why LED’s flicker- and how to stop it

June 28 2018, 15:42 PM

Why LED’s flicker- and how to stop it

Have you installed LED light bulbs only to have them start flickering on and off? Well, you’re not alone.

LED fixtures/bulbs are operated by an electronic driver in which some are more susceptible to noise, {voltage fluctuations}, than others depending on the quality of the fixture/bulb.

So what’s causing the flicker? It could be a number of things. But most commonly, LED bulbs may flicker or dim in your home when there are voltage fluctuations in your home’s wiring.

When electrical loads turn on and off in your home, this creates a change in voltage levels, which may cause the LED lights to occasionally dim or flicker.

But there are other reasons that may be causing your lights to dim or flicker. Let’s take a look:

  1. Inrush current from appliances

    Certain appliances in your home need more power when they first turn on. The inrush current of motors within appliances causes the voltage to drop and if the lights are on the same circuit you may see dimming of these lights. This is true for many types of lighting including LED.

    You should already have appliances on separate breakers such as your fridge, stove, washer and dryer. If this isn’t the case then a certified electrician should be called to investigate further.
  1. Loose wiring or loose bulb

    Another thing that commonly causes flickering in LED bulbs is loose connections or circuits. This is easy to fix. Just screw the LED bulb in tighter to see of that fixes the problem.  If there’s a lot of dust in the fixture, first blow out the connection points to remove the dust before putting the bulb back in. 

    There may also be loose wiring at the fixture connection point. A certified electrician will disconnect power to the fixture and re-tighten the wiring to make sure it’s tight and secure. If there are numerous light fixtures dimming at the same time then the electrician will investigate at the panel and/or junction box to ensure that all connections are properly secured.
  1. Dimmer compatibility

    Some existing and even new dimmer switches may not be compatible with LED lighting or you may have a non-dimmable light in a dimmable fixture. Carefully reading the labeling on your bulbs and fixtures and making sure you have the right bulb for the job can fix this. Dimmers also have wattage ratings which differ depending on the type of light source whether it is LED, incandescent, etc. This affects the number of light fixtures on a dimmer depending on the individual wattages of each. The practise of ganging dimmers or switches within the same back box will also further de-rate the wattage the dimmer can safely handle. A certified electrician will determine by referring to the Canadian Electrical Code the correct load permitted.

    Be sure to buy high quality with recognized certification (CSA, ULc etc.), ENERGY STAR® certified LED bulbs when upgrading your lighting in your home. 

 

 

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