About the efficiency of lamps, including LEDs. Efficiency, service life and efficiency of LEDs - how to measure and improve

The photo shows a 20 Watt LED lamp. It replaced two 75 watt incandescent bulbs and is a little brighter than them.

But before we talk about LED lamps, let's dispel a few myths that have already quite firmly won their place in the minds of users. At the same time, we will consider the questions of what LED lamps are, how to choose (we recommend considering the Mantra LED chandeliers catalog), why they are better, why they are worse, and why they have such powerful advertising support today.

What temperature is the light in your house: warm or cold?

In fact, the question is not idle, since it is the spectrum that makes the light its own, pleasant to the eye (warm), or, on the contrary, bright (cutting), that is, cold. Different ones use different principles for converting electricity into light, so their spectrum is different. This is where the first myth arose - the light of LED lamps is the most natural. In fact, this is not entirely true; LED lamps for the home can have any spectral glow, and in this case the advantage of these lamps becomes a disadvantage. Not every consumer will look into the technical specifications to figure out what's what.

The second myth was born from the labeling, and is that the power of LED lamps is lower than all others.

The third myth is the most complex; they worked on it for a long time, driving into our heads the idea that LED lighting in an apartment is the most energy-saving.

There is another rumor that it is better not to use LED lamps for the home, since they cannot withstand smooth adjustment or voltage surges, and also quickly fail if turned on frequently.

Let's start from the very beginning, because understanding what an LED is will help us make our decision, not based on rumors, myths and machinations of incandescent lamp sellers.

Where and what kind of light from LED lamps do we see?

The answer right away is the one you chose, both from the point of view of light temperature (spectral characteristics) and from the point of view of power consumption per specific illuminated area. Or, to put it simply, an incandescent lamp of one hundred watts will always shine at one hundred watts in the way it can, while an LED will not only shine where it is needed, but also with the light that is pleasant to you. And either the element (point) or the surface will glow, depending on which LED lamp was chosen for this area of ​​the room.

The most controversial issue is the issue of energy saving. This myth was born as an argument in a dispute between competing manufacturers, and to be honest, energy-saving lamps actually consume slightly less energy for lighting than LED lamps. Ask how to choose here? If you believe the manufacturers, then no way. This is parity. The balance of a fragile world at war. True, LEDs are rather the injured party here, since they appeared on the market after large corporations invested a lot of money in energy saving, deciding that LEDs were too expensive a toy.

And then, one event happened that is directly related to the subtitle. It turned out that the spectral characteristics of LEDs are slightly better than even daylight. It turned out that the light of LED lamps does not have flicker, which even incandescent lamps have. In an incandescent lamp, this is the mains frequency (usually 50 Hertz), and in a fluorescent (energy-saving) lamp it is a multiple of the triple phase, that is, approximately 3 Hertz. Probably everyone has seen “blinking” fluorescent lamps? This is the same. The lamp glows only when there is current; as long as there is no current, it does not shine. It's just more noticeable in fluorescent lamps.

The LED lamp does not have this drawback; it is not sensitive to current, voltage drop, or frequency. There is tension - it shines, no - it does not shine.

If you work a lot at the desk, with documents or small work, buy an LED desk lamp and forget about eye fatigue. Problems with vision during such work are the same flicker that we do not notice.

What is the difference between the physics of light from LED lamps and all others?

Basically energy conversion. This is what solves several lighting problems:

1. Minimum electricity consumption for lighting.
2. The most correct spectrum of room lighting (zones in the room).
3. Spot lighting of a selected area (for example, a painting).
4. Durability and reduction of heating of the luminous element.
5. Ability to control the spectral characteristics of lighting.
6. Minimum cost of lighting devices.

All these problems were solved by LED lamps. All that remains is to decide how to choose the right ones and it’s in the bag. True, LED lamps do not solve the last point in any way, being still the most expensive. It's all about that very transformation. The LED directly, without intermediaries, converts electrical energy into light. This is a fairly new technology, so point 6 is still a limitation in choice for many.

Simple numbers in the useful conversion of electricity into light

• Incandescent lamp. Efficiency 12% loss 75% (coil heating);
• Modernized incandescent lamps. Efficiency 15% loss 68% (filament resistance);
• Induced glow lamps (fluorescent, mercury, etc.). Efficiency 22% losses 45% (reactive, starting currents);
• LED bulbs. Efficiency 58% losses 18% (switching);
• Closed circuit lamps. Efficiency 84% loss 6% (closed cycle until the end of the battery charge).

If you add up these numbers, you will not get 100%. This is an experimental factor. But the efficiency value is exactly how much electricity becomes light. Closed-cycle lamps are street-type lamps with solar panels and batteries. They do not require energy costs, and if desired, you can even read a newspaper by their light. Everything else can be seen from the numbers above.

A little more physics. Piezoelectrics (remember the “eternal lighters for gas stoves”?) When producing a “spark” when pressed, they do not waste “matter”. They can really “eternally” produce a discharge spark when you press a key. And no batteries are needed. An LED works in much the same way. Voltage is applied to the contacts, and the material emits a photon of light. The lamp begins to shine. We don’t know how long such lamps can shine, since they started working not so long ago, and no one yet knows what the energy saturation of excited materials is with “light.” One thing is obvious: LED lighting in an apartment will last for many years. Simply put, within a single apartment it is a kind of “Eternal Light Illuminator”. At least in theory. Let's now come down to earth and see what happens in practice.

Practical recommendations for choosing lighting with comments and tips

Before we get to the question of how to choose LED lamps, a little about the technical characteristics. Let's start with the main thing: with what shines.

The glow of an LED lamp is a continuous (without flickering) conversion of electrical energy into light. In other words, 1 kWh of energy will be converted into light with an efficiency of at least 60%. This, by the way, is the answer to the question, I want LED lamps, how to calculate the power, in comparison with incandescent lamps? It's simple. LED efficiency is no less than 60%, incandescent lamp efficiency is no more than 12%. Hence the ratio - a 30-watt LED lamp shines as brightly as a 150-watt incandescent lamp. And there’s no catch, because with this comparison, an LED lamp will still consume almost half as much electricity. More precisely, you will pay half as much for the same lighting.

When choosing an LED lamp, pay attention to the following factors:

• We select LED lamps first by power, taking into account the reduction factor - a 100-watt incandescent lamp is a 12-watt LED lamp. We assure you that their luminosity will be the same. True, the light of an LED lamp will be warmer and more pleasing to the eyes.
• The second point of choice is the spectrum. Few people think about what it means when they read the Kelvin number on the packaging. The fact is that other lamps simply cannot have exactly this characteristic - that very “light temperature”. However, it is worth remembering that the higher the number, the brighter and warmer the light of LED lamps will be in your home.
• The possibility of smooth adjustment (dimmer control) is also indicated on the packaging as the note “smooth brightness control is allowed.” If you decide to spend money on saving, it is worth keeping in mind that LEDs can be “dimmed” if full light is not needed.
• Compliance. Agree, an expensive lamp that has nowhere to be inserted is the same case - money down the drain. Lamps with all types of bases and almost any form of luminous element are now produced:

Basic selection options

What do we have as the main parameters? This is not as simple a question as it seems.

1. Manufacturer? Warranties and service life? Applicability in networks with unstable voltage?
2. Possibility of switching on in difficult conditions (including for outdoor use) and under overloads?
3. Approximate amount of savings if you use only LED lamps for lighting?
4. Comparative cost of lighting devices if everything is replaced with LED lamps.

1st question. It is very difficult to understand who the manufacturer is, whether there is a warranty on the product, and how long it will last. Based on the characteristics, it is sometimes difficult to understand whether this lamp is for 220V or 127V? Often the spectrum of a lamp is indicated as a point on a scale that no one except a scientific optician can understand. Permissible voltage fluctuations are not written down at all, except perhaps in the lamp’s passport, as a strange-looking sinusoid.

2nd question. Any LED lamps can be turned on and off under any overload conditions. This is the first type of lamp that continues to shine after a short circuit in the network. Also, this is the first type of lamps whose luminous element cannot fail due to network overloads. Strictly speaking, an LED lamp can generally fail only through physical destruction. At least, there is no data yet on the cessation of glow for other reasons. And these lamps have been studied for 12 years. An interesting finding is that the power of LED lamps allows them to act as a kind of fuses against network loads. Have you heard the words “Diode bridge”? So here is an LED lamp, a kind of trigger that can relieve excess load in the form of a flash. You may not see it, but your power grid will be grateful for such a discharge.

3rd question. A 100-watt incandescent lamp, when operated continuously for a year, uses 100% of the electricity generated. The meter will count this electricity and convert it into a payment receipt from the energy company. If we replace an incandescent lamp with an LED lamp that has worked for the same long time, then we will also receive a bill for payment from the energy sector. True, this account will differ from the first. If we paid 100 rubles for an incandescent lamp, then for an LED lamp we will pay 18.5 rubles. Of course, you may not believe this, so take a calculator and do the math. Better yet, install LED lighting in your apartment, and after a month compare bills from energy companies.

4th question. The difference in price will be approximately 8 times for incandescent lamps. That is, for the same lighting with LED lamps, you will pay about 7-8 times more than for incandescent lamps.

Real savings

It has now become obvious that, given the sharp rise in energy costs, the payback period for all energy-saving devices has been significantly reduced in time. In addition, it is worth remembering that all these devices, as a rule, are high-tech products that can work for many years in a row. Therefore, when choosing lamps, do not think about whether it will be LED or not. Look at the manufacturer, the quality of the font on the packaging, the company name, and electrical compatibility. Then remember that a 100-watt incandescent light bulb (at a price of 10 rubles) will cost you 4 times kWh (there are 24 hours in a day), that is, 4 (24 0.1) at least 10 rubles a day if you forget to turn it off. And an LED lamp for a home of comparable power, costing 200 rubles, with the same forgetfulness will cost only 1 ruble 15 kopecks.

We will not impose our opinion, but in our team there are few who have not replaced conventional lamps with LED ones. Not for energy-saving lamps, but for lamps that save money!

How efficient are LEDs really and how can you extend their lifespan?

How to measure their efficiency at home and increase the efficiency, as well as increase the durability of LED lamps?

To answer all these questions, it is enough to conduct several visual experiments, without using any complex laboratory instruments.
LED is one of the most efficient and easiest to use light sources. However, at the same time, it still wastes most of the energy consumed, converting it not into light, but into heat.

Of course, there is no need to compare LEDs with a regular light bulb; here they have run far ahead. But how high do you think their real efficiency is?

How to measure LED efficiency

Let's check this live, not by the labels on the packages and data from tables on the Internet, but by the colorimetric method at home.

If you lower an LED into water and measure the temperature difference before it turns on and some time after, you can find out how much energy from it will turn into heat.

Knowing the total amount of energy expended and the energy lost into heat, you can actually find out how much benefit from a given light source was converted into light.

The container in which measurements will be made must be insulated from temperature fluctuations outside and inside. A regular thermos flask is suitable for this.

With some modification, you will have a completely usable homemade colorimeter.

To isolate and prevent current leakage, all wires and terminals on the LED should be coated with a thick layer of electrical insulating varnish.

Before the experiment, pour 250 ml of distilled water into the flask.

Place the LED in water until it completely covers it. In this case, the light should come out freely.

Turn on the power and start counting down the time.

After 10 minutes, turn off the voltage and measure the water temperature again.

At the same time, do not forget to mix it well.

Now you need to repeat the experiment, but this time, tightly seal the matrix with some opaque material. This is necessary so that energy cannot leave the system in the form of light.

The experiment with the sealed specimen is repeated again in the same sequence:

• 250ml distilled water

• initial temperature measurement

• 10 minutes of “glow”

• final temperature measurement

1 of 4

After all measurements and experiments, you can proceed to calculations.

Efficiency calculation

Let's say for this model the average consumption of the light source is 47.8 W. Operating time – 10 minutes.

If we substitute these data into the formula, we get that over a period of 600 seconds, 28,320 J were spent on lighting the LED.

In the case of the sealed model, the water heated from 27 to 50 degrees. The heat capacity of water is 4200 J, and the mass is 0.25 kg.

Another 130 J per degree was spent heating the bulb, plus you need to add energy to heat the LED itself. It weighs 27 grams and is mainly composed of copper. The result is a figure of 27377 J.

The ratio of energy released and energy expended will be 96.7%. That is, more than 3% is missing. This is precisely heat loss.

In the case of an open LED, the water heated from 28 to 45 degrees. All other variables remained the same. The calculation here would look like this:

What conclusion can be drawn from all these experiments and calculations?

As can be seen from this small experiment, about 28% of the energy left the system directly in the form of light. And if we take into account 3% of heat losses, then only 25% remains.

As you can see, LEDs are still very far from being ideal light sources, as many sellers present them.

Even worse, there are often models on the market of extremely low quality with even lower efficiency.

Brightness and power

Let's now compare the brightness of different models and see what it depends on and whether we can somehow influence it. To make a reliable comparison, use a regular piece of pipe and a lux meter.

Let’s say a previously tested high-quality sample provides illumination of 1100 lux. And this is with a power consumption of 50 W.

What if you take a cheaper model? The data may turn out to be two times lower - less than 5500 Lux.

And this is with the same power! It turns out that you will pay the same amount for light as in the first case, but you will receive it 50% less.

Is it possible to get 3 times more light while spending as little energy as possible?

It is possible, but for this you will need an LED operating in a slightly different mode. To understand how to do this, you need to take some more measurements.

First of all, you should be interested in the dependence of brightness on power consumption. Gradually increase the power and monitor the lux meter readings.

As a result, you will reach such a nonlinear relationship.

If it were linear, you'd get something like this.

It will turn out even more interesting if you calculate the relative efficiency of the LED, taking the power value of 50W as 100%.

You can see how its effectiveness is deteriorating. This deterioration with increasing power is inherent in all LEDs. And there are several reasons for this.

Why LED Efficiency Deteriorates

One of them is, of course, heating. With increasing temperature, the probability of photon formation in the p-n junction decreases.

In addition, the energy of these photons decreases. Even with good cooling of the case, the temperature of the pn junction can be tens of degrees higher, since it is separated from the metal by a sapphire substrate.

And it doesn't conduct heat very well. The temperature difference can be calculated by knowing the dimensions of the crystal and the heat generated on it.

With a heat release of 1 W, taking into account the thickness and area of ​​the substrate, the junction temperature will be 11.5 degrees higher.

In the case of a cheap LED, everything is much worse. Here the result is more than 25 degrees.

High junction temperatures lead to rapid degradation of the crystal, shortening its service life. This is where blinking, flickering, etc. occurs.

I wonder if manufacturers are unaware of this difference in temperature or are they deliberately creating doomed devices?

Often, components that seem to be in normal, expensive lamps operate in extreme conditions, at maximum temperatures, without any safety margin.

As long as the current is small, it is not noticeable. But due to the quadratic relationship, as the current increases, more and more of the energy turns into useless heat.

How to increase efficiency

That is, connect another LED in parallel, thereby halving the resistance losses. And this method certainly works.

By connecting two LEDs in parallel to the lamp instead of one, you will get more light with less energy and, accordingly, less heat.

Of course, this also extends the life of the LED.

You don’t have to stop and connect 3.4 diodes instead of one, it won’t be any worse.

And if there is not enough space for several LEDs, then you can install an LED originally designed for high power. For example, a 100-watt, 50-watt lamp.

It is in this way that the efficiency of the lamp can be increased several times, with the same energy consumption as the original source, but with less power, and operating at the limit of its capabilities.

Moreover, using no more than a third of the maximum power, you will forever forget what it is like to replace burnt-out LEDs.

At the same time, their operating efficiency and efficiency will increase noticeably.

Therefore, when purchasing LEDs, always be interested in the crystal size. After all, their cooling and internal resistance depend on this.

The rule here is that the more, the better.

With the advent of energy-saving light sources on the market, people began to wonder which ones are better and whether it is worth replacing old Ilyich light bulbs. Next, we will try to compare incandescent and LED lamps in the most detail, providing tables, a little theory and video reviews! To do this, various criteria will be considered in order, ranging from performance characteristics to savings indicators.

A little history

So that you understand the difference in the appearance of both options, and, accordingly, the difference in what scientific and technological progress has been, let us present the following facts comparing incandescent and LED lamps by date of invention:

• The first light source (with a tungsten filament) was patented in the 1890s by Russian engineer Alexander Nikolaevich Lodygin. At the same time, the first attempt can be considered the invention on July 11, 1874 - a filament lamp.
• As for the LED, the first one whose glow was visible was invented in 1962. The man who invented LED lighting is Nick Holonyak, an American scientist.

As you can see, even if you compare the date of invention of alternative options, you can see a huge difference of almost a century. However, the oldest light bulb is still “fighting for its place in the Sun,” which is its huge advantage.

Power and light output

The first step is to carry out calculations. One of the most important calculation indicators is the light output of devices. For an older light bulb, the light output fluctuates between 8-10 Lm/W. As for LEDs, their light output efficiency is usually in the range of 90-110 Lm/W, although there are also models with an indicator of 120-140 Lm/W. From the values ​​provided above, it is clear that in terms of lumens, LEDs are 7-12 times better than the alternative option.

To help you understand how this will affect the comparison of incandescent lamps and LED light sources in terms of power, we will provide the corresponding table:

It can be seen that the power of the diodes is 5 times less, and at the same time the glow efficiency and brightness will be approximately the same.

To independently calculate the light output of a light bulb, you need its luminous flux (indicated on the packaging in “Lm” divided by the power “W”), as a result you will get the desired value. For example, if the luminous flux of an LED is 1000 lumens and the power is 13 W, the output will be 76.9 Lm/W.

Video review of significant differences in luminous flux

Difference in illumination indicators

Heat dissipation

The second, no less important point of comparison between LED lamps and incandescent lamps is the heat transfer from the product. The glass bulb of an incandescent lamp can heat up to 250 degrees (although the temperature is usually around 170). That is why such products are fire hazardous, and it is not recommended to use them when installing electrical wiring in a wooden house. In addition, Ilyich bulbs are difficult to unscrew from the socket if they have been working for a long time before (you can get burned). LEDs in this regard have proven themselves better than all existing options. Their maximum heating temperature does not exceed 50 degrees, which allows them to be used in any room.

Life time

But this indicator is one of the main advantages of diodes compared to incandescent lamps. These lighting sources can operate for over 50,000 hours, according to manufacturers. Older light bulbs usually have a service life of less than 1000 hours, which is 50 times less. For reasons of economy, it is better to buy an expensive but long-lasting light bulb once than to change a budget product every few months.

There is also a nuance here that you should be aware of. The high longevity ratings of LEDs are not an exact value. The fact is that diodes fade (degrade) over time, so after 40,000 hours you will no longer be able to enjoy the glow that you had immediately after purchase. You can learn more about it from our article.

Efficiency

Efficiency should also be taken into account when choosing products. Efficiency shows how much electricity is converted into light and how much into thermal energy (which is actually what causes the bulb to heat up). The efficiency is about 90%, which is a very high figure compared to the alternative option, in which only 7-9% of the electricity is converted into light.

Environmental friendliness

Unfortunately, many do not pay due attention to preserving the environment. People throw fluorescent lamps into trash cans, despite the fact that when the bulb is destroyed, mercury evaporates, which harms both the environment and the health of people around.

In this regard, a comparison of incandescent and LED lamps does not put any option in the lead. Both the diodes and the glass bulb can be simply thrown into the trash, without special disposal.

There is an opinion that the Ilyich bulb creates infrared and ultraviolet radiation, negatively affecting human health. In this regard, LED bulbs are completely safe.

Price

And, of course, the most interesting question that users often ask is how profitable it is to buy LEDs, because they are an order of magnitude more expensive. Today, on Internet forums you can read many reviews that refute or justify the savings of LED lamps. The lowest price for a high-quality diode light bulb is 300 rubles, while the alternative costs 20-25 rubles. Here you should independently analyze what is more important to you - a long service life and high efficiency indicators, or low cost and unnecessary overpayment. Based on this, comparisons can be made in terms of cost savings. The power of diodes is 7-8 times less, the price is 10 times more. Take into account the service life and even without special calculations you can understand that it is more profitable to buy LED lamps. You can clearly see a comparison of the efficiency of LED lamps and incandescent lamps in the table below:

Other indicators

I would also like, based on the tables, to compare incandescent and LED lamps according to such characteristics as:

• current strength;
• fragility;

LED lampsModern have sufficient brightness, which could not be said about the LEDs of the previous generation, whose low brightness significantly limited their use. Currently,..

Efficiency. The efficiency of modern LED lamps is 22%. In addition to high efficiency, LED lamps also boast great durability, up to 50,000 hours, which in turn is equivalent to 17 years of operation, 8 hours a day. Modern have sufficient brightness, which could not be said about the LEDs of the previous generation, whose low brightness significantly limited their use. Currently, after the issue of LED brightness, their popularity has increased dramatically. Despite the high cost, but thanks to their high efficiency, service life and significant savings on electricity and installation work, LEDs are gaining more and more popularity. In addition, the long service life of LED lamps allows them to be installed in hard-to-reach places, this is especially true when using LEDs V . For more than 130 years of history, incandescent lamps, which have dominated the world of lighting technology all this time, have had many disadvantages: they are a fragile filament that can fail during shaking, and a large percentage of heat output, which significantly reduces the useful power ratio to the luminous flux. The efficiency of conventional incandescent lamps is only 2.6%. A more technologically advanced fluorescent lamp has a slightly higher efficiency of 8.7% and has also made a significant contribution to energy savings. The use of fluorescent lamps has revealed several significant disadvantages: a short service life in real conditions, possible flickering, and possible failure to turn on at low temperatures, as well as blinking when there is a lack of voltage. In addition, burnt out fluorescent lamps require special disposal. Fluorescent lamps They have an extremely negative attitude towards the intermittent cycle of operation, on and off.

have high efficiency, low power consumption and long service life, bright light, excellent illumination and no flicker. Due to their high performance characteristics they are becoming more and more widespread, they are especially often used in. Company Professional Light and Sound offers you a wide range of modernLED lamps And high quality at an affordable price, based on qualityLED lamps(Cm:) .

Also on our website you can look at other information that may interest you, and our specialists, in turn, will provide you with any technical support: , , , , , , ,

I would like to ask one question. Do you often change the paws in your apartment? It doesn't take much time, and the light bulbs themselves aren't expensive. But don't you think times have changed a little? The development of technologies in the electrical field, or rather devices and lighting sources, currently allows us to approach these issues from a different angle.

Comparison of different LED lamps

There are a huge number of light bulbs on the market, which differ in design, materials from which they are made and color palette. But the basic elements that make up lamps are the same for all types.

LED lamps consist of:

• Housings;
• Scattering flask;
• LEDs;
• Driver.

An important role in the normal operation of an LED light bulb is played by its body, which includes a radiator, a base and a diffuser. The radiator of these lamps is made of aluminum or its alloys and has a complex shape, which ensures high-quality heat removal, which in turn determines the longevity of the LEDs themselves.

If the radiator is small or made of low-quality materials, the service life of this lamp is reduced several times due to long-term overheating of the LEDs. The bulk of the LED lamp is the weight of the radiator.

Poor-quality connection of the plate with LEDs to the radiator is not capable of dissipating heat efficiently.

For uninterrupted and long-lasting operation of LEDs, it is necessary to limit the current. This function is performed by the driver. There are two types of limiters on the market: using a capacitor and a driver.

There are a huge number of LEDs from different manufacturers. The main parameter of LEDs is the number of Lumens/Watts (brightness or light output). The more expensive the LED, the better quality it is. Such LEDs glow brighter and heat up less, which determines how long the lamp will last.

When comparing LED lamps of different prices, it was noted that more expensive models heat up less, there is no visible flicker, and these lamps have a higher light output.

LED light bulb power

Research has proven that LED-based lamps are the most economical and technologically advanced. But on the modern market there are other types of lamps that are widely used for private and industrial use.

Types of light sources (lamps):

• Incandescent;
• Luminescent;
• Halogen.

All of these light sources differ from each other in many respects, but for each of them the manufacturers declare a certain power and luminous flux.

The power of all electricity consumers is measured in Watts, which means that the power of any lamp, as well as the power of various electrical appliances, can be measured using a Wattmeter.

The power of LED lamps is their most important characteristic, since this parameter directly affects the amount and intensity of light from the lamp. But it is worth understanding that the power of the lamp is not a direct factor indicating the luminous efficiency. This suggests that with the development of LED technology, manufacturers are trying to increase the light output per watt of electricity consumed.

For example, an LED lamp of the same type, but of different generations with the same light output, can reduce energy consumption by 10%. And this, in turn, is beneficial from an economic point of view for those who purchase this type of product.

It is important to know! The power and luminous efficiency indicated on the packaging may not correspond to the parameters of the light bulb due to the dishonesty of the manufacturers.

It is also worth noting that the same power of lamps from different manufacturers does not in any way affect the light output. This parameter is directly indicated by the luminous flux numbers, which for one reason or another are different for each manufacturer. For example, a 10-watt LED lamp from one manufacturer will produce a luminous flux of 700–800 Lumens, and a lamp from another manufacturer will produce 600–650 Lumens.

The power consumption of LED lamps varies from 2 to 30 Watts.

Efficiency of LED and incandescent lamps: compliance

LED lamps are an excellent alternative to conventional incandescent lamps, and also have qualities that contribute to their most comfortable use.

Advantages of LED lamps:

• Low power consumption;
• Effective light output;
• High luminous flux;
• Low operating temperature.

Replacing conventional incandescent lamps with light sources based on LEDs should be done correctly. Since, in order to obtain the desired luminous flux, it is necessary to compare the brightness values ​​of different types of lamps and convert the brightness and power values.

Table of values ​​for LED and incandescent lamps:

Using this table, you can easily make a translation and cope with the selection of LED lamps to replace outdated models of incandescent lamps in terms of power and amount of luminous flux.

According to the characteristics, it is clear that a 10-watt LED lamp has the same luminous flux as a 60-watt incandescent lamp.

It is important to know! The service life of LED lamps is tens of times longer than that of incandescent lamps.

In order to avoid any questions when choosing the right LED light sources, you need to know that the base used is marked E27. LED lamps using this base come in candle, pear and other various shapes.

By applying this knowledge, you will not have to buy suitable lighting fixtures along with the lamps, which will undoubtedly simplify the work of replacing lamps with more economical ones.

The difference between LED lamps and energy-saving lamps

LED and energy-saving lamps differ significantly from each other not only in form and content, but also in the principle of operation (signs by which the glow occurs).

These types of lamps are compared by:

• Brightness;
• Heat transfer during operation;
• Durability.

An LED lamp is essentially a solid-state light source, the operation of which is based on the emission of light when an electric current passes through semiconductors, which in turn are designed for this.

The operation of energy-saving lamps is based on the operating principle of fluorescent lamps, which allows them to produce the required luminous flux at low energy costs. And if we compare lamps that fit this definition, then we can say with confidence that only fluorescent ones are energy-saving.

In order to determine which lamp shines better and how much electricity it consumes, let’s take LED and energy-saving lamps for comparison. The luminous flux of a 12-watt LED lamp is 900 Lumens, and an energy-saving lamp of the same power produces 600 Lumens. This suggests that from an economic point of view, both types of lamps are beneficial.

The low operating temperature of LED lamps allows them to be built in in accordance with any design solutions.

If we compare these types of lamps in terms of the amount of heat generated, then in this case the results differ greatly. A 12-watt LED lamp heats up to no more than 31 0 C during operation, but the heating of an energy-saving lamp corresponds to 80 0 C.

And speaking of operating time, for energy-saving ones it is 8,000 hours, and for LED ones up to 50,000 hours.

Modern LED lamps: power in the table (video)

LED technologies are gradually replacing outdated ones. This is due to the fact that despite the higher cost at purchase, this type of lighting allows you to save in the future.