There are a lot of different things that could be causing the lights in your home to flicker there could be a connection or switch problem or the bulb could be loose. The first thing you need to do is locate the issue through the process of elimination. You may even find out your lights are dimming for no reason at all. Fortunately, a bit of investigation and being aware of more likely causes of lights flickering can make this annoyance easy to resolve.
Connection or Switch
Start by gently wiggling the switch to see it a flicker appears. Check the screws in the plate of the light cover to see if they are connected as it may have a bad connection. If you have a lamp flickering, check to be sure the plug is secure in the outlet. If the plug is loose, squeeze the prongs closer together until it fits correctly. It may also mean the filament in the bulb is loose. The easy solution to this problem would be to replace the bulb.
Bulbs are Loose
Simply turn the light off and remove the bulb in the light fixture or tighten it to see if it continues to flicker. You do not have to place extra force on the bulb, but you should try a replacement if it is still not working correctly.
You may be experiencing frayed wiring on the fitting outside causing a short where the cables from the power line connect with the house. The danger level of resolving this issue is extremely high and should be resolved by an expert. A local utility company or electrical contractor (such as one from Conway Electric) should be notified immediately because this is a huge fire hazard. The part would be replaced free of charge.
Appliances with high wattage could cause flickering if they are on the same branch circuit. If you have appliances that turn off and on the inrush current could cause a flicker. Issues may also exist with voltage problems associated with your refrigerator or freezer. You may also have a device that is operating correctly, but requires more energy to start, such as an air conditioner or sump pump.
It is also possible that your neighbor's home is on the same transformer as you and you are sharing the same circuit. The flickering could be a result of nothing more than an overuse of power between the two homes. Other than cutting back on power usage in your home, there is not a lot you can do to resolve this particular problem.
According to the National Fire Protection Association, electrical problems are the greatest cause for residential fires. More than 320 annually are killed from fires spurred by faulty lighting or electric issues. The flickering lights in your home could be nothing to worry about, but it is still worth investigating to prevent electrical-related injuries.