Household lights that flicker and even dim periodically can certainly be annoying, but they can also be hazardous, which is why flickering lights should never be ignored. In most cases, a flicker or brief dimming of light that becomes more prominent over time indicates the presence of a poor connection somewhere in the system that needs to be fixed. Power arcing is the most likely cause for flickering lights. Arcing is a luminous discharge of current that forms when a strong electrical current jumps a gap in a circuit or between two electrodes. Arcing is a potentially dangerous issue because the jumping of currents is similar to how lightning forms. This arcing draws power, which can be witnessed by the flickering lights in a home. Additionally, arcing creates heat, which can directly start a fire in your home. Contact Mister Sparky immediately if an area of your home is experiencing flickering or dimming of lights.