6 Reasons why Light starts dim then get brighter

Have you ever relaxed in your lightroom and realized that the light glowed prettier? That’s something that frequently happens. Unfortunately, numerous people assume that the bulb has a problem. Though sometimes this might be the situation, it doesn’t always happen. There are several justifications why the light bulb can suddenly grow brighter and develop a much wholly different light level in your room.

If the light in your house begins to dim and then brightens, you should repair the problem as quickly as possible. There’s a good likelihood the panel connection or the service wire from the transformer is loose or rusted. The electricity provider is responsible if the fault exists between the transformer and one’s meter, but one will need an electrician if the issue is in the panel.

This article will give the various reasons why the light in your house lights dimly first and then grows bright and what to do to eliminate the issue.

Reasons why light starts dim and suddenly gets brighter

6 reasons why Light starts dim then get brighter

1. Use of energy-saving light bulbs

It’s not uncommon to discover that energy-saving light bulbs become brighter over time. Typically, these bulbs are intended to help you save money on your energy bill. They will sometimes switch on at a low rate before brightening up. This is a great thing, especially if you only require the lighting for a moment, but it might be inconvenient when you require the light quickly. You’ll switch on your light and give it some time to illuminate the space entirely.

Sometimes, dealing with this hold period might be challenging. The lighting fixture should, however, start working at full capacity within a short while. A light bulb that saves energy is usually an excellent addition to any house, though one must be prepared to deal with occasional light variations.

Always be careful to use a unique type of light bulb in areas where you know you’ll require bright light immediately, such as an entrance. You don’t have to keep waiting for a prolonged time to get around the house.

Ensure you look for the bulb’s serial number someplace on the bulb if you do not exactly know what type of bulb you possess. It’s simple to look up the model number to see if you have an energy-saving light bulb.

2. The light bulb may be about to burn out.

The most common reason for light bulbs unexpectedly becoming brighter is that they are likely to burn out. A filament is usually found inside the bulb. As the filament thinks, this is an implication that the light bulb is almost losing its usefulness and might blow out anytime.

Turning the lights off and on repeatedly is an excellent way to check this. In most cases, this will be enough to damage the filament, causing the light bulb to blow out permanently. This may occur with any light bulb, particularly with the indoor and outdoor Xmas tree lighting.

If you glance around your home and see that a series of lights have suddenly become extremely bright, you will most likely need to replace the entire strand shortly. Since light bulbs don’t last indefinitely, it’s a good idea to keep a spare or two on hand in case this happens.

However, this doesn’t occur with LED lights, as you will realize. LED lights will last considerably longer and consume significantly less energy. You can tell when a light bulb is ready to lose its brightness by looking at it.

If that’s the circumstance, carefully dispose of the bulb and replace it with a new one. When light bulbs are on the verge of dying, when they first become brighter, you will likely use the light bulb for a short while before the bulb completely fails.

3. Fluctuating Electricity 

Occasionally, electricity in your residence will vary significantly due to usage. For example, a significant amount of electricity is consumed by different individuals whereby one is making dinner, another one is ironing, and the other person is playing games.

This additional electric power will be drawn from the facility’s total allowable electricity. If it is noticed that the housing is having difficulty obtaining all of the electricity it requires, likely, some equipment and electronic products will not function properly. This implies that while other equipment is operating, your room’s light bulb may remain somewhat dim.

Whenever an electrical appliance is abruptly switched off, the energy used by the remaining lights in the room increases. This may cause the light bulb to become brighter suddenly. In essence, the bulb is receiving the maximum amount of electrical power permitted.

If that’s the issue, you will probably discover that the electric power tends to rise and reduces a little, and thus the light frequently changes brightness. You may need an electrical engineer to find out whether you can do anything to fix the issue.

It could be that your electricity has an undefined drain that allows the residence to work with smaller quantities. Just checking this out can grant you more control and hence a less power fluctuation in your home. This is generally considered a problem with older homes where many people live.

Often, the electrical system needs to be fully modified to facilitate all and every device it uses. To understand the impact of fluctuating electricity, try to switch off your TV or disconnect the iron box from the power source and see whether it has any effect on your room’s lighting.

4. Electrical issues.

When you realize an issue with the light bulb’s lighting, you might have some electrical issues in your place of residence. There could be a cable problem or even a pet coming into your building’s power lines.

The ideal way to address this issue is to remove any other problems and get an electrician to evaluate your building. Then, ensure you take the light fixture out, substitute it for another and note it does anything.

If the substitution of the bulb doesn’t improve the problem, the electric problem is probably a strong likelihood. Try to think of any other possible problems with your electricity. For example, if you have flipped circuit breakers lately or realized other power fluctuations, you might have an electrical issue to deal with.

Sometimes cables gradually lose their linkage in an existing house and need to be replaced or installed in new connectors. I recommend that you always check for loose connections and tighten them for consistent lighting of your house.

5. Cleaning of the light bulb.

Light starts dim then get brighter

Many people overlook this consideration when they think about the brightness of a lighting fixture increasing. When your house’s light bulb has recently been cleaned, it can sometimes appear to be slightly brighter.

This is because light bulbs are prevalent for the dust to accumulate. Since it is not frequently disturbed, dust tends to accumulate on the light bulb. When a coating of dust accumulates on the light bulb, the light output of the bulb reduces.

Numerous individuals usually wipe the dust from the bulb to resolve this issue and notice that the room appears much brighter. Accumulation of dust on the light bulb can be thought of as a filter in that it will block light rays, thus reducing the brightness level in the room. Therefore, if you notice a significant difference, you should likely wipe the light bulbs more frequently.

6. Peak hours of electricity usage

Along with peak power consumption in your place of residence, you’ll notice peak consumption in your neighborhood too. Since many people work from home, specific neighborhoods experience significantly increased electrical pull during peak periods of the day.

Although power surges are frequently associated with storms, it could not always be the case, as power surges might occur at any time. When the day’s power consumption begins to decline, you may realize that the client’s light bulbs suddenly become brighter.

Consider the occasions when you realize the bulb is suddenly becoming prettier and see if they correspond with future power surges in the neighborhood. Additionally, surge protectors are necessary to safeguard your household and outlets.

Surge protectors can assist in ensuring that the electricity does not damage or burn out any of your devices. When the fluctuations pass through the lines, they can cause significant harm to household equipment.

If you do not wish to install a whole-house surge protector, it would best help to use one for your computer and printer. These two items are frequently highly susceptible to these power surges. If you do not protect them, they will almost certainly have long-term problems. While residents of areas prone to storms are familiar with this concept, you should protect your appliances from more than just lightning.


In conclusion, there are numerous reasons why you may notice the brightness of a light bulb increasing abruptly. The faster it becomes brighter, the more likely the bulb is about to burn out. If your light bulb gradually becomes brighter, this indicates that there are other possible causes.

In general, a light bulb abruptly becoming prettier is nothing to be alarmed about, but you should have some understanding of how it works. From above, consider the outlined reasons to determine why your lighting starts dim and then gets brighter and eliminate the issue.

Again, if you believe you have a genuine electrical problem, it is always prudent to consult a professional. Sometimes it may be issues you’re your vision, whereby you cannot differentiate different light strengths. For this case, a doctor’s check will help. Homeowners should avoid tampering with electricity as people can get injured while repairing electrical problems without the necessary knowledge.

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