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LED lights are an energy efficient way to light your home, and should last for more than a decade before you need to replace them. More and more people are making the switch, as the technology has improved to allow for brighter bulbs that look almost identical to traditional light bulbs. However, LEDs work differently to old-style light bulbs, and this can cause some issues when fitting them into older circuits. 

On this page we look at some of the most common issues experienced when switching to LED bulbs - such as LED lights flickering, buzzing or not dimming properly - and how to resolve them. 

The best start is to buy high-quality LEDs. We put LED light bulbs and spotlights through a variety of tough tests to make sure they are safe, produce high quality light and meet the claims on their packaging. Use our independent light bulb reviews to filter by type, brightness or score and find the perfect LED lights for you.

How to Repair LED Bulb 
LED bulbs can flicker or buzz if the current (the flow of electrical charge) doesn’t remain constant. There are a number of possible causes for this:

1. Incorrect dimming set-up

This causes flickering and buzzing, and is usually down to using the wrong dimmer switch. Your home is likely to have a ‘leading edge’ dimmer. These are designed to smoothly dim old-style bulbs in a circuit with a range typically between 200W to 1,000W.
This is a problem for LEDs that don’t need anything like that level of current in the circuit. For example, if you switch from 4 x 60W bulbs in a circuit to 4 x equivalent brightness 9W LEDs, your total wattage has gone from 240W to 36W.
‘Trailing edge’ LED dimmers (from £15) dim on a much lower wattage and will better control your lights and avoid flickering. Make sure you check the wattage rating of the trailing edge dimmer to make sure it suits the wattage of the lights in the dimmer circuit (count up the total wattage of all of the bulbs in the circuit you are dimming). Choosing a dimmer with too low or high a range will mean that you can't smoothly dim your new LED bulbs. 

2. A high-powered appliance in the same circuit

This is rare, but if an appliance with a heavy power draw, such as an electric fan, is on the same circuit as low-power LED bulbs, it can cause flickering. 
LED bulbs require a much lower voltage (the force needed to make electricity flow) than traditional bulbs, so they have internal drivers (transformers) to reduce the voltage to the LED bulb. Turning on the fan, in this example, can cause a momentary voltage surge in the circuit.  
The flickering you see is the drivers in the LED bulbs adjusting the voltage to suit the LED. Getting an electrician to examine your circuits will be the best way to fix such a problem.

3. Loose connections

This is one of the most common causes of flickering. If you've eliminated other possible causes, it's best to get an electrician to assess if this is the problem in your home