Why does a candle flame flicker? Main reasons and solutions


Photo: Freepik

You light a candle on a quiet evening, but the flame flickers restlessly and spoils the mood. This article explains why candle flames flicker and offers practical solutions at home to make the flame stable and pleasant.

The problem is not just aesthetic. A flickering flame can indicate an inappropriate size of the candle burner, the wrong choice of candle wax or container, as well as air currents in the room. Let's look at how to distinguish cause from effect, when the shape of the candle or candle lantern is to blame, and when environmental factors should be paid attention to.

In the following sections, I will show you step by step how to diagnose the causes and take immediate action. We will focus on wicks and trimming them, the characteristics of soy candles and other waxes, proper first-time burning, and safety aspects. The goal is to provide clear criteria for choosing and caring for candles so that the flame is calm and the room feels harmonious.

Environmental conditions as the main cause of flame flickering

Most often, the cause of a flickering candle flame is not the candle itself, but the room conditions. The flame is particularly sensitive to air currents, and even a slight draft can cause it to sway. This not only spoils the atmosphere, but also reduces the quality of the burn and the lifespan of the candle.

Air movement in the room

Drafts are not only caused by open windows or doors. They can also be caused by ventilation systems, air conditioning, or even people moving around. If a candle flame flickers in these conditions, the solution is simple – place the candle in a place where the air flow does not reach it.

Candle position

Candle lanterns or vessels that are too narrow can create turbulence. If the glass edges are too tight, the air circulates unevenly and the flame starts to vibrate. In this case, a wider vessel or lantern with enough ventilation holes helps.

Surface stability

If a candle is placed on an unstable or tilted surface, the flame will change shape, giving the impression that it is constantly twitching. The key to a good candle is a solid, level base that ensures even burning.

Although these reasons seem simple, they are the most common, and often just changing the location of the candle is enough to make the flame calm.

The role of a candle's burner and wick in flame stability

The wick is the “heart” of a candle, and its size and quality directly affect how evenly the candle burns. If your candle flame flickers , it is very likely that the problem lies in the choice of burner or care of the wick.

Wrong wick size

  • A wick that is too thin creates a weak flame that flickers and may even go out.
  • A wick that is too thick burns too intensely, causing soot and an unstable flame.

Therefore, the size of the wick should match the diameter of the candle and the type of wax. For example, soy candles often require thicker wicks because this wax melts more slowly than paraffin.

The importance of wick length

If the wick is not trimmed regularly, it will form carbon balls and cause sparking or uneven burning. The optimal wick length before each lighting is approximately 5-7 mm.

Burner quality

Quality candle wicks are made from cotton or wood. Cheaper wicks with a metal core can not only cause flickering of the flame, but also release harmful substances.

Careful wick selection and care is one of the most effective solutions for achieving a calm and stable flame, regardless of whether beeswax or soy candles are used.

Candle wax and shapes as influencing factors

Not only the wick, but also the candle wax and the candle shapes used can determine how calm or restless the flame will be. Different materials burn differently, and the behavior of a candle sometimes even varies depending on the design of the container or lantern.

Wax characteristics

  • Paraffin wax is the cheapest, but burns faster and tends to produce more smoke.
  • Soy candles burn slower and produce a softer flame, however, an incorrectly chosen wick can make the flame unstable.
  • Beeswax is characterized by clean burning and a stable flame, but requires precise temperature control during candle making.

If the wax is not of good quality or contains impurities, the flame will burn unevenly and may flicker.

The meaning of shapes

Candle shapes affect how air circulates around the flame. Narrow or deep containers can restrict oxygen access, causing the flame to vibrate. Containers that are too wide, on the other hand, tend to create an uneven burning area. Candle lanterns with decorative openings sometimes create drafts, which directly affect the stability of the flame.

Handmade candles

Handmade candles are often more stable and of higher quality, as their craftsmen pay attention to both the purity of the wax and the suitability of the shapes. In mass production, these factors are not always strictly observed, so the stability of the flame can also vary.

The choice of candle material and shape is as important as the quality of the wick – only by balancing these elements can you achieve a calm and safe flame.


Practical solutions to prevent flame flickering

To create a peaceful atmosphere with candles, it's not enough to simply light them - it's important to pay attention to some practical habits. These will help prevent situations where the candle flame flickers and ensure a long, even burn.

Regular wick care

Before each lighting, the wick should be trimmed to a length of 5–7 mm. This prevents excessive flame formation, smoke, and uneven burning.

Correct first firing

When burning for the first time, the candle should melt all the way to the edges. This prevents tunneling, which later causes flame instability.

Candle placement

  • Avoid drafts and open windows.
  • Do not place a candle directly under a vent or air conditioner.
  • Always use a flat and stable surface.

Choosing wax and candle quality

Choose proven products – such as soy candles or beeswax candles from trusted manufacturers. Cheaper options with impurities often cause the flame to flicker.

Safety tips

Always use candle holders or candle lanterns designed for burning. This not only stabilizes the flame, but also protects against accidents.

By following these rules, candles will not only be aesthetically appealing, but also safe and long-lasting.

Conclusion and inspiration to create peaceful light

Candles are more than just an interior detail – they symbolize peace, warmth and a special mood. However, only a properly prepared and cared for candle can create a stable light that does not become a nuisance. In this article, we looked at the main reasons why a candle flame flickers – from environmental factors and wick selection, to the influence of candle wax and shape.

By implementing simple habits into your daily life, such as trimming the wick, burning it correctly for the first time, and choosing a quality wax, you can ensure that your candle becomes a safe and harmonious source of light. Thus, handmade and carefully crafted soy candles or beeswax candles reveal their true value – a peaceful flame that brings true warmth to your home.

If the flickering of a candle flame has been a distraction from your enjoyment of the atmosphere, now you have all the tools to prevent it. Light a candle with confidence and let the light create an environment where you can relax and feel safe.

Frequently asked questions about candle flame flickering


Why does a candle flame flicker?

This is most often caused by air currents in the room, such as drafts or ventilation. It can also be caused by the wrong wick or poor quality wax.

Does the length of the wick affect the flame?

Yes, a wick that is too long will create a large, smoky flame, while a wick that is too short will create a weak and unstable flame. The optimal length is 5–7 mm.

How does candle wax affect the flame?

Paraffin tends to produce more smoke, soy candles burn more slowly, but beeswax candles provide a clean and steady flame.

Do candle lanterns help stabilize the flame?

Yes, if they have sufficient ventilation holes. Lanterns that are too narrow can create turbulence that causes the flame to flicker.

How to prevent a candle flame from flickering at home?

Place the candle away from drafts, trim the wick, use quality wax, and make sure the candle is on a stable surface.

Back to blog