When choosing an LED lamp, pay attention to the lumens to ensure the amount of light you need.

We usually buy things based on the quantity we need, right? When we buy milk, we buy it in liters. Then why should it be different with light? For decades, we've bought light bulbs based on how much energy they use (watts)—and without regard to how much light they give us (lumens).

Lumen measures how much light you get from a light bulb. The more lumens, the brighter the light. Fewer lumens produce less light.

But brightness and lumens can vary greatly, so there is a certain way to calculate the appropriate specifications.

Practical calculation method:

• to replace a 100-watt incandescent bulb, look for an LED bulb that produces 1,100 lumens;
• 75-watt lamp - about 750 lumens;
• 60-watt lamp - about 550 lumens;
• A 40-watt lamp is about 200 lumens.

If you need something less bright, purchase LED bulbs with fewer lumens.

Lighting efficiency:

But we must not forget that Lumen is the total light flux from the source. However, this measurement usually does not take into account the focusing efficiency of the reflector or lens and is therefore not a direct parameter for assessing the brightness or useful beam performance of a luminaire. A wide beam of light can have the same lumens as a narrowly focused beam. Lumens cannot be used to determine the intensity of a beam because the lumen rating includes all scattered and wasted light.

Lux is a unit of measurement of illumination.

For example, 1 Lux is equal to the illumination of a surface with an area of ​​1 m² when the luminous flux of radiation incident on it is equal to 1 lumen. If you collect 100 lumens and project them onto an area of ​​1 m², the illumination of that area will be 100 lux. If the same 100 lumens are directed at 10 m², the illumination will be 10 lux.

Label for LED lamps:

What should be on the packaging when you buy LED lighting products?

To help consumers better understand the transition from watts to lumens, the Federal Trade Commission has proposed a new label for LED bulbs. This label will help people buy light bulbs that are right for them.

Just like food labels, lighting labels can help consumers understand what they are really buying. The label clearly indicates: luminous flux, type of bulb, price, estimated cost of operation per year and color of the glow from warm white (with a yellowish tint) to cool white to cold (with a blue tint).

It can be difficult even for an experienced consumer to understand the technical features and numerous characteristics.

The following questions are common regarding LED lamps:

• What is the equivalent of a 100-watt incandescent lamp?
• How is the luminous flux of a lamp determined?
• How many lumens are in a light bulb?
• How to choose an LED analogue to incandescent lamps?
• How many lumens are contained in 1 W of an LED light bulb?

Check out the table for the ratio of lumens (Lm) to watts (W) for an incandescent lamp in relation to an LED lamp:

How many lumens are in 1 W LED bulb?

In LEDs, the luminous flux varies depending on the manufacturer, quality and voltage. Average values ​​for 1 W are 80-150 lm. If you increase the voltage of the LED, the luminous flux will also increase, but this also entails an increase in the emitted temperature. To reduce the temperature, various cooling methods are used using radiators and cooling systems.

What is a lumen?

Lumens measure the luminous flux of a light source.

How to determine the number of lumens in a light bulb?

First, you need to study the product box or product specification for the specified luminous flux. If the information is not provided, you can find a similar product from a well-known manufacturer to compare the characteristics.

It is also possible to determine how many lumens are in your light bulb yourself using a lux meter. Lux denotes the ratio of the number of lumens to the illuminated area (1 Lx = 1 Lm\sq.m). You need to know the illumination declared by the manufacturer for a specific LED lamp.

In practice, the illumination indicator on the working surface, measured in lux, is of primary importance. The correspondence of illumination of working surfaces and premises for different fields of activity is determined by state standards prescribed in SNiP 05/23/2010.

How many lumens are there in LEDs relative to other light sources?

• LN - incandescent lamp,
• GLN - halogen lamp,
• LL - fluorescent lamp,
• CFL - compact fluorescent lamp,
• MGL - metal halide lamp.
• DRL - mercury arc lamp. High-pressure gas-discharge mercury lamps. Used for general lighting of industrial premises and open spaces.

Lamp type	Power, W	Length, mm	Diameter, mm	Base type	Light flow
DRL 125	125	178	76	E-27	≅ 5500
DRL 250	250	228	91	E-40	≅ 12000
DRL 400	400	292	122	E-40	≅ 20000
DRL 700	700	357	152	E-40	≅ 40000
DRL 1000	1000	411	167	E-40	≅ 55000

Light output can be reduced by up to 40 percent due to re-reflection losses, depending on the lamp body and the shape of the diffuser when using DRL in lamps.

Delivery cost in Moscow:
(Delivery from metro stations located outside the Moscow Ring Road is also included, but no further than 1.5 km from the metro)
Delivery on weekdays (Mon-Fri) from 10.00 to 20.00. Separately by agreement in the evening after 20.00
Delivery on weekends only when placing an order before 12:30 Friday!
The cost of delivery of oversized goods (more than 5 kg and measuring more than 100 cm on one side),
calculated separately.

Delivery within the Moscow Ring Road - 300 rubles.
The weight of the goods does not exceed 5 kg and the length on one side does not exceed 100 cm
Delivery time 1-2 days or by agreement with the buyer.

Urgent delivery (on the day the order is placed) - 400 rubles.
Available only when ordering before 12:30.
The weight of the order should not exceed 5 kg and the length on one side should not exceed 100 cm (cases and covers)

Delivery beyond the Moscow Ring Road (up to 20 km) - 450 rubles.
Carried out by the SDEK courier service.
Delivery time from 1 day, not counting the day of dispatch.
The period depends on the remoteness of the settlement and is calculated approximately
and may vary depending on the workload of the couriers.

Pickup in Moscow (UniExpress pick-up points):
Metro Natatinskaya - 1st Nagatinsky pr-d, 2, building 36
Metro Kitay-Gorod - Kolpachny lane, 6 building 5, under. 10A
Delivery time 1-2 days
If the order amount is less than 3,000 rubles, a commission of 100 rubles is taken.

Pickup is also possible through SDEK shopping centers.
Delivery time to Moscow is 1-2 days.

Delivery across Russia:
Delivery is carried out by Russian Post, TC SDEK. Separately, as agreed by the parties, by other delivery services.

Delivery by Russian Post:
Goods are sent that meet the requirements of the Russian Post in terms of size, weight and contents.

100% Prepayment- full payment of the cost of the order and delivery.
Depending on the amount and weight of the order, it is cheaper than cash on delivery by an average of 80-110 rubles
C.O.D- payment for the order upon receipt at the post office.
The cost of shipping is higher on average by 80-110 rubles than when sending with prepayment.

Delivery TC SDEK:
Goods are sent that meet the requirements of SDEK TC in terms of size, weight and content.
Shipping costs are calculated based on the shipping method, weight and size of the parcel.
Delivery options 100% prepayment or cash on delivery. Cost depends on size, weight
and destination.

To the SDEK shopping center terminal (pickup from the order pick-up point)- the most budget option in which
The recipient independently picks up the parcel from the SDEK shopping center.
With 100% prepayment.
Cash on delivery.

Delivered personally by courier TK SDEK- a more expensive option involves delivery to your home, work, or in person.
The parcel can be sent:
With 100% prepayment.
Cash on delivery.

In recent years, approaches to organizing lighting in everyday life and public spaces have changed smoothly and painlessly. Now you won’t surprise anyone with LED lamps.

Stores sell LED and fluorescent lamps, but the buyer continues to keep in mind “power” as the main indicator for lighting sources. Prudent manufacturers, of course, indicate the power on the packaging of LED products, what this may mean. Should we focus on power and how to determine the correspondence between types of devices?

More information about the level of illumination that an LED light source produces can be found in the lumen output. We’ll look into what lumens mean in LED lamps in this article.

What is a lumen

The concept of lumens was established by the international measurement system in the mid-twentieth century.

Lumens measure the amount of total light emitted by a source. The parameter is directly related to the concept of luxury, but there is a difference between them.

Expert opinion

Alexey Bartosh

Ask a question to an expert

It is important to understand! Lumen is the total amount of light that a source is capable of emitting in all directions. Lux is intended to indicate how much light falls on a square meter of surface.

Therefore, if a lamp emitting 100 Lux illuminates 1 m2 of surface, then a flux of 100 Lux will fall on it. If the same light bulb shines in a room of 10 m2, then its illumination will be significantly lower. It is important to know that the calculations should take into account the entire luminous flux, in all directions.

Understanding this hides one of the advantages of LED devices over incandescent lamps and fluorescent devices that glow in all directions. For diode lamps, the lighting angle approaches 120 or 180 degrees. Using built-in or external lenses, beams of any width are obtained.

LED light bulb from inside

Conclusion: the light flux is directed and used in the desired direction, increasing its concentration.

Manufacturers actively use this feature when developing LED lamps installed instead of halogen and xenon d2s lamps in car headlights. They are cheaper than xenon, put less load on car electrics than halogen ones, and are not inferior in terms of illumination level.

Modern diodes are used to manufacture and replace 20 W lamps in side lights and 55 W lamps in car headlights.

Parameters that determine the luminous flux indicator and its calculation

Several indicators of luminous flux are important for human perception:

• The amount of everything coming from a light source.
• Wavelength. It determines how the eye perceives the brightness of light. Emission in the middle, green part of the spectrum appears brighter than the blue or red parts, given the same lamp power.
• Color temperature is measured in Kelvin and must be indicated on product packaging and data sheets. The picture shows the color temperature scale and the color of the emitted light.

Note! Warm tones are perceived by the human eye as less bright than cool colors. When purchasing “warm” lamps, make a small margin in the direction of increasing the power to create comfortable conditions in the room.

Color temperature in comparison

How many lumens are in 1 W LED bulb?

Finding out the truthful answer to a question is not so easy. The fact is that manufacturers indicate power and luminous flux for LEDs, not light bulbs. Actual values ​​can only be measured with special instruments. You should focus on averages.

In general, when consuming 1 W of power, LEDs emit 90–100 lm. Expensive samples are capable of delivering 130–140 lumens from one watt.

LEDs producing 220 Lm/W have been obtained in laboratory conditions, but the devices are not produced on an industrial scale due to their high cost.

The built-in LED power driver reduces the efficiency, reducing the luminous flux to power ratio by 5–10%. It is important to take this into account when choosing and purchasing light sources.

Converting lumens to watts

For users who do not want to study the characteristics of electrical appliances and carry out calculations, there are many resources on the Internet with built-in calculators. It is enough to substitute the data provided by the manufacturer (lumens) and select the type of lamp to obtain the required power indicator.

Method for calculating illumination for premises

Calculating the required number of lighting fixtures uses a simple technique.

Calculations are carried out in two stages:

• Calculation of the required luminous flux intensity.
• Determining the number of lamps capable of providing the required illumination.

Formula for approximate calculation of lighting level, Lm.

Luminous flux = standard illumination indicator in lux (shown in the table) * room area in m2 * ceiling height coefficient.

Table 1. Illumination standards

For ceilings up to 2.7 m, a coefficient of 1 is applied, for room heights from 2.7 to 3 m - a coefficient of 1.2, from 3 to 3.5 m - 1.5.

Calculation example. In children's rooms, the illumination standard is set at 200 Lux. Room area 12 m2 Height 3.1 m - we use a coefficient of 1.2.

Multiplying 200 * 12 * 1.2, we get the required luminous flux of 2880 Lm.

Knowing the light indicator, choose devices capable of providing it. For the given room, one LED lamp with a power of 25–30 W, or three 10-watt sources, is sufficient.

Expert opinion

Alexey Bartosh

Specialist in repair and maintenance of electrical equipment and industrial electronics.

Ask a question to an expert

Important! To better illuminate the room, it is wise to use several lamps. This will illuminate the room evenly and get rid of shadows.

Comparative characteristics of an incandescent lamp and an LED lamp

Power usage of different types of light bulbs

When comparing technical characteristics, all parameters speak in favor of diode devices.

Table 2. Comparison of LED and LED characteristics.

The regularly decreasing price of LED lamps and the economic benefits of their use make the devices popular among buyers.

How many lumens are there in LEDs relative to other light sources?

Table 3. Average luminous flux indicators for different power consumption.

LED lamps from trusted manufacturers have undeniable advantages when used at home and in production. They are durable, economical, and quickly pay for themselves. The ability to choose any shade of light will make your stay in the room comfortable and safe.

Good day, dear readers.

The review is devoted to replacing standard incandescent lamps in reversing lights for domestic cars. My choice fell on 1156 3W 7000K 160-Lumen 1-LED White Light Convex Lens Car Braking Lamp (DC 8~30V)
1156 - designation of a single-pin light bulb socket for domestic cars

A worthwhile purchase if applied correctly.

Saying (can be skipped)

After purchasing a VAZ 21099 for a penny, I was very happy about everything, except that reversing maneuvers in the dark were very difficult. We had to drive blindly, or “until a characteristic sound”, which is not very pleasant. And the reason for this turned out to be non-standard taillights, most likely made in China.
The lanterns are made with high quality, and despite the light tinting and thanks to the presence of normal reflectors, all signals are clearly visible. But for the reverse signal, the reflector simply “did not fit”, and at night such maneuvers were extremely inconvenient. Having tried to install several higher-aperture lamps instead of standard ones, I still found a good option offline, although I even tried 35W halogens.

Halogen lamp 35W

More precisely, I found it, but for one “super-bright LED” light bulb at the local market they offered to pay me 1,200 rubles. And I need four of them.

They told me about Chinese stores, or more precisely, about DialExtreme. I started searching, found several options for multi-diode lamps... But since I was constrained by the size of the mounting hole (the light bulb is inserted into such lamps from the inside), I came to bright single-diode solutions.

Fairy tale (main part of the review)

Among all the single-diode lamps with a suitable base (1156), there was only one lensed one on the dial. I spent several evenings comparing with analogues () - and then I decided and ordered four pieces + tracking. There were no reviews on them, but that didn’t stop me.
It took a very long time to collect the order. I posted it on December 17, 2011, but the package arrived only on February 29, 2012 (RA450804338CN). They didn’t ship for a long time, making excuses for delays from suppliers, although there were no marks on the website that the goods were out of stock.

However, they still arrived.


The packaging is rather poor. Each light bulb is packaged in a small transparent bag, then an anti-stress bag and then a paper postal bag on top. I thought that the bulbs were placed in something more solid, like a cardboard box, but shipping in such conditions did not damage the bulbs at all.

The lamps look good, there are no gaps in the joints of the parts, the lenses do not dangle and are installed smoothly. True, the lenses are made of plastic, but this is not surprising. All parts of the lamps are made to a decent standard - there are no untreated rough edges or casting or stamping flaws. The sockets look better than those of original Russian-made factory lamps.

Only now, the light is more cold white than blue. 5000-6000K per eye.
The white balance, of course, is not great, but you can see the photo.

Well, now a little experimentation. :)

A4 sheet illuminated from a distance of just over a meter

A light bulb lies on a sheet of paper

Comparison with halogen 35W on a sheet of paper

The tip of the thermometer lies on the radiator of the LED lamp for 10 minutes. 32 degrees Celsius with an ambient temperature of 22 degrees.

Everyone knows that halogen gets very hot.




Place the tip of the thermometer on the bulb of a 35W halogen lamp
I didn’t wait for more than 150 degrees

And now a comparison with halogen 35W at the “workplace”. The criteria are subjective, since I don’t have a garage and nowhere to assemble a stand. Therefore, I will act as a stand.

First, a general view with and without flash.

With flash

No flash

I am at a distance of about 1m from the car near a lamp with LED lamps (2 pcs)

I am at a distance of about 1m from the car near a lamp with 35W halogen lamps (2 pcs)

This is the purchase. For my purposes, the light is too focused, I will probably have to modify either the bulbs or the seat to direct the light flux lower.
However, at first glance, the quality of the lamps themselves completely suits me. They are even neater than the factory variations “Mayak” and others that can be bought in stores in my city.

My verdict is a worthwhile investment. When purchasing, pay attention to the shape of the light beam.

I'm planning to buy +6 Add to favorites I liked the review +11 +26