Why light bulbs often burn out and what you can do about it

Light bulbs always burn out, no matter where they are used. This problem can occur in various fixtures, such as chandeliers, sconces, floor lamps, and even nightlights. However, the worst case scenario is when a light bulb burns out in the refrigerator. Just imagine the horror of opening the refrigerator at night, hoping to find something to eat, only to be met with darkness. The disappointing result is having to go hungry because of a simple burned-out light bulb. There can be several reasons for this unfortunate occurrence. It could be due to a sudden voltage jump or the use of low-quality bulbs produced by careless manufacturers. In order to prevent such mishaps, it is important to understand why light bulbs burn out and learn how to extend their lifespan. Otherwise, the uncomfortable experience of waiting hungry in the dark will continue to haunt us.

Why you have to change light bulbs all the time

As mentioned previously, there are multiple possible causes for the successive burnout of light bulbs. Alongside power surges, this could be attributable to subpar electrical circuit contacts, frequent device switching, elevated ambient temperature, external vibration, and more. All of these factors hinder the longevity of light sources.

Voltage fluctuations in the power grid

The standard voltage of current in our power grids should be equivalent to two hundred and twenty volts. Most electrical appliances are designed to operate with this voltage. If, for any reason, the voltage exceeds the required value, the tungsten filament responsible for the illumination of the light bulb begins to overheat, leading to a reduction in its lifespan.

To verify the voltage, utilize a multimeter. Develop a habit of taking measurements twice a day to determine the frequency of such voltage spikes. This often occurs in the evening, when people return home from work, or during periods when businesses are operational. An additional indicator of a power surge in the grid is the simultaneous burning out of light bulbs and the tripping of automatic breakers.

1. Acquire light sources that have the capacity to handle higher voltages, specifically around two hundred and thirty or two hundred and forty volts.
2. Incorporate additional protection. Install a protective unit on every switch which will safeguard the lamps from unnecessary loads by ensuring a gradual and controlled power supply.
3. Implement a voltage stabilizer by placing it in the primary junction box.
4. Substitute all existing lamps with fluorescent or LED lamps. These types of lamps are resistant to voltage surges in the electrical grid.

Citation. Not all power surges automatically result in the disconnection of plugs and appliances. Alternatively, they may not always be rendered inoperable due to these surges. It is possible that the electrical network is concurrently linked to numerous devices, causing their combined energy consumption to exceed the allowable threshold. Furthermore, a short circuit can also cause automatic appliances to shut down.

Contacts of poor quality

During the Soviet era, the fixtures used plastic sockets, and the quality of the plastic depended on the price of the device. It was considered lucky to find a fixture with a ceramic socket, as they were rare. These lighting fixtures were designed to be used with bulbs that had a maximum power of forty watts. If you tried to use a brighter bulb, like a sixty watt one, the socket would gradually develop cracks. This would lead to burnt contacts and the presence of oxide on them.

If you have followed all the guidelines and still find your house too dark, consider replacing all the bulbs with fluorescent ones. Most modern fixtures have a limit of forty watt bulbs. Why live in a gloomy and dim environment when you can simply switch to a different type of bulb?

One possible cause for light bulbs burning out is substandard electrical wiring. It is important to examine all connections within the junction box and secure any loose screws. Additionally, all cables should be properly fastened to ensure that nothing is hanging or loose.

Synopsis. If you experience a light bulb burning out in your apartment, it is recommended to inspect the power requirements of all electrical devices in use. If any malfunctions or inadequate power supply are detected, consider replacing the affected appliances.

Inspect the connectivity of all cables within the junction boxes to determine the quality of the connection. Pay particular attention to any areas that appear melted or blackened from soot. These areas should be cleaned, and if connections are loose, they should be tightened. Replace any temporary twisted wires with pads.

Avoid connecting wires made of different materials, such as aluminum and copper, if possible. These types of connections can become very hot. However, if it is unavoidable to have such connections, it is recommended to use pads instead of connecting them directly.

Defective switch

First, it is important to inspect all the switches in your house. If you happen to come across a faulty one, it could result in burnt-out light bulbs. Take apart each switch one by one and examine the condition of its contacts.

Tip: If you notice sparks when toggling the switch, or if there are signs of carbon deposits or blackened wires on the contacts, it’s best to dispose of the switch. If a light bulb burns out simply from pressing the button, there’s no need to dismantle the switch – just toss it away. Replace it with a new one and consider adding a dimmer switch for smoother on/off transitions.

Surprisingly, switches also have expiration dates, with the timing varying from model to model. It’s important to regularly replace worn-out switches.

Regrettably, the quality of our domestically produced lamps is inferior to their foreign counterparts. The ones that tend to malfunction the most frequently are those with a power output not exceeding sixty watts, which is understandable as they are the most widely used.

The primary reason for the previous popularity of purchasing Russian light sources was their affordability. However, they are now priced similarly to manufacturers such as Osram and Philips. While they may be comparable in cost, their quality does not match up. Consequently, it is advisable to opt for imported versions instead.

There are numerous criteria by which these light sources should be chosen. Nevertheless, before disposing of all the household lamps and replacing them with imported ones, it is crucial to verify: "Is the issue stemming from them?".

Frequent switching on

When the light is switched off, the tungsten filament inside it cools down, resulting in a slightly lower resistance compared to when it is heated. Continuous on and off switching leads to the evaporation of tungsten molecules due to the passing current, ultimately causing the filament to break prematurely.

If the bulb is exposed to frequent vibrations, impacts, or other mechanical pressures, its lifespan can be shortened. To prevent this, it is recommended to replace incandescent bulbs with LED bulbs or smaller fluorescent bulbs.

Why halogen bulbs often burn out

The halogen lamp is not a common fixture in our household appliances. It is typically found in spotlights, but can also be used in chandeliers. These lamps are sensitive to touch and should not be handled with bare hands. Oils from our skin can leave greasy marks on their delicate surface, causing them to overheat and ultimately damaging the bulb.

Prior to installing the said lamp, it is essential to wear a pair of fresh gloves. If you happen to come across any kind of grime or dirt on the surface, promptly remove it by taking the extra effort to moisten a cloth with alcohol and wipe it away. Additionally, it is important to note that these bulbs are not compatible with improper wiring.

As we have come to understand, the lifespan of a lamp is directly influenced by the quality and competency of the wiring, the type of devices used, the presence or absence of power surges, mechanical impacts, ambient temperature, and the switch itself. The longer the bulb remains on, the more it heats up and the quicker the tungsten will evaporate. With increased heat, the brightness of the bulb intensifies and the time until failure shortens.

For reference, a typical light bulb has an average "life" of one thousand hours. If you were to measure the light intensity, you would notice that after 750 hours, the light diminishes by fifteen percent.

If the voltage in the power grid is slightly elevated, even by just five percent, the lifespan of the bulb is cut in half. Instead of lasting one thousand hours, it will only last five hundred.

In apartment buildings, you can observe this phenomenon with the light bulbs in the entrances. These bulbs are specifically designed to only be turned on during the night. During this period, the electrical load is minimal, resulting in a rise in voltage. To ensure optimal functioning, tungsten filament, which tends to be cold when the bulb is off, is typically preheated with a small current before reaching full power. This is where the invention of dimmers comes into play.

Operating voltage

Nowadays, light bulbs are no longer labeled with a specific voltage value but rather with a range in which they can operate. For example, they may be designed to work within the range of 215 to 225 volts or within the range of 230 to 240 volts. By following these guidelines and ensuring that the voltage of the power source does not exceed these limits, you can ensure that the bulb will shine brightly and have a long lifespan.

The reason for this voltage range is that the voltage levels are not consistent throughout the entire electrical line. In areas closer to a substation, the voltage naturally tends to be higher, while in more distant areas, the voltage may drop.

Check the condition of the bulbs

If you notice that the light bulbs in a particular socket frequently burn out, it may indicate an issue that needs to be addressed. Take a closer look at the socket and consider measuring its temperature when it is in use. If the temperature is too high, it may be worth cleaning all of the contacts and gently adjusting the center and side contact.

It is quite common to observe that electricians, while installing lights in entrances, make sure to include special diodes in front of them. This does not affect the quality of voltage, but enhances the durability of the light source. In order to achieve this, a diode, a resistor, and the bulb itself are connected in a series circuit.