How to count lumens in suites. How to convert suites into lumens

Recently, many people are thinking about switching to the use of LED. If earlier there was one such parameter as power, now it is a full-fledged electronic lighting device with several main power supply units on chips, light from warm to cold, and even three-color RGB.

Ignorance of the ratio of LED lamps and incandescent lamps is used by unscrupulous sellers and manufacturers, for example, indicating the brightness of 800 lumens and stating that it is analogous to conventional 100 W incandescence.

Power ratio table

The table shows the power ratio for led with open diodes, that is, without a bulb, which reduces the brightness by 15-20%.

The most common misconception is when it is considered that a 10W LED light is equivalent to a 100W incandescent lamp. But taking into account that the matte bulb reduces the brightness by 20% and 1W goes to the heating of the driver, in the end we get only 7 useful watts, which will give 700-800 Lumens on average. Which is completely below the required 1300 lm.

Example of a matt flask

Powerful diode bulbs use a bulb to protect your eyes, especially children, because it is as dazzling as welding.

An analogue of the incandescence at 100W will be two diode lamps at 650 Lumens. When choosing now, do not rely on Watts, but use the number of Lumens on the correspondence table. The greater the brightness of the diode, the more should be its radiator. This is one of the indirect ways to determine the power and pick the right equivalent.

1. Also on sale you can find long LED G13, which can replace mercury in fluorescent lighting, keeping the current case.

2. If your lighting for the room has not yet been designed and installed, then in order to reduce the cost of lighting, you can install. The panel measures 60 by 60 cm and has a thickness of 1 cm without a power supply. It can be mounted on almost any ceiling in an overhead way. In return, we get a huge brightness of 3600 Lm for 1250 rubles.

3. I prefer diode lamps in the form of corn, they have a good design and do not require a separate radiator to remove heat and the bulb. The only drawback is the open electrical contacts of the diodes with low voltage.

Suites and lumens are very often confused. These values ​​are used to measure the illumination and light flux, respectively, and they must be distinguished. The magnitude of the light flux characterizes the light source, and the level of illumination is the state of the surface onto which light enters. For measurement of illumination, the unit of measurement lux (Lc) is used, and the lumens (Lm) are used to characterize the light source.

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Instructions

Klux = Klumen / Km?

To convert luxe to lumens, apply the formula:

Klumen = Klux * Km ?,

where:
  Klux - illumination (number of suites);
  Klumen - the amount of light flux (number of lumens);
  Km? - Illuminated area (in square meters).

When calculating, consider that the lighting should be uniform. In practice, this means that all points on the surface must be equidistant from the light source. In this case, the light should fall on all parts of the surface at the same angle. Also note that all light emitted by the light source must come to the surface. If the light source is close in shape to the point source, then uniform illumination can be achieved only on the inner surface of the sphere. However, if the luminaire is sufficiently far from the illuminated surface, and the surface itself is relatively flat and has a small area, then the illumination can be considered almost uniform. A "bright" example of such a source of light can be considered the sun, which due to the huge distance is an almost point source of light. Example: In the center of a cubic room 10 meters high there is a 100 W incandescent lamp.

Question: what will be the illumination of the ceiling of the room?

Solution: an incandescent lamp with a power of 100 watts creates a light flux of about 1300 lumens (Lm). This flow is distributed on six equal surfaces (walls, floor and ceiling) with a total area of ​​600 m ?. Consequently, their illumination (average) is: 1300/600 = 2.167 Lx. Accordingly, the average illumination of the ceiling will also be equal to 2,167 Lx.

To solve the inverse problem (determine the luminous flux for a given illumination and surface area) simply multiply the illumination by area. However, in practice, the light flux produced by a light source is not calculated in this way, but is measured with the help of special instruments - spherical photometers and photometric goniometers. But since most light sources have standard characteristics, for practical calculations use the following table:

Incandescent lamp 60 W (220 V) - 500 lm.
  The incandescent lamp is 100 W (220 V) - 1300 lm.
  The fluorescent lamp is 26 W (220 V) - 1600 lm.
  Sodium gas discharge lamp (outdoor) - 10000 ... 20000 Lm.
  Low pressure sodium lamps - 200 lm / W.
  LEDs - about 100 Lm / W.
  The sun is 3.8 * 10 ^ 28 Lm.

Lm / W is an indicator of the efficiency of the light source. So, for example, a 5W LED will provide a luminous flux of 500 lm. That corresponds to an incandescent lamp that consumes 60 watts of power! How simple

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Light is one of the most important factors in the normal development of the child's body. The saying is true: "Where the sun rarely happens, the doctor often peeps in there." To increase the access of light to the dwelling and other rooms where children spend their time, you should often wipe the window panes,

Replacing incandescent lamps with energy-saving ones is the first step that must be taken in the direction of saving electricity consumption. Many have already replaced the usual light bulbs for fluorescent (compact and linear) and LED. The latter - although expensive, but at the moment are the most economical. Energy-saving lamps are called devices with high luminous efficiency, and the higher it is, the more energy is saved.

Appearance of lamps: incandescent, luminescent compact and LED

Main characteristics

The main characteristics include the following indicators:

• lamp power, measured in W (watts);
• light efficiency or luminous efficiency (brightness), measured in Lm / W (lumen / watt);
• color rendering index, measured in%.

The power of a light bulb indicates the amount of energy consumed per hour, the luminous efficiency - how much light it gives for 1 spent watt, and the color rendering index for sunlight (ideally 100%).

What should be the illumination or how much light do you need to perform certain tasks? To do this, use the lc (lux) illumination unit. It shows the level of illumination, which is created by a light flux of 1 lm, evenly distributed over the surface in 1 m 2.

Illumination must comply with the regulations established by the legislative documents (SNiP). Check it is not hard. To do this, it is enough to make simple calculations. It is necessary to calculate the total power of the lamps W, which are either installed in a particular room or planned to be installed, multiply the resulting figure by the light output of the bulbs in lm (indicated in the lamp's passport) and divide by the area of ​​the room in m 2. The obtained calculations are compared with the normative indices.

Principle of operation

In incandescent bulbs, the source of light is an electrical conductor. current, made of refractory wire, which under its action is heated and begins to glow. The conductor itself is placed in a flask of glass filled with an inert gas. For connection to the power supply, there is a socle, which is marked with the E27 marking at a standard light bulb used in everyday life.

A conventional incandescent bulb

A variety of incandescent bulbs are halogen lamps, which differ from the usual lighting devices only materials and manufacturing technology. The addition to inert gases in the flask, bromine vapor or iodine (halogen) brings the color rendering index closer to 100% and increases light output. This advantage was appreciated by manufacturers of automobile headlights. On the roads are important factors such as the clarity of the subject and the illumination, which allowed using halogen lamps to realize these 2 important advantages in the production of automobile headlights.

Standard halogen light bulb

In fluorescent lighting fixtures under the influence of el. a gas discharge occurs which is emitted in the ultraviolet. This contributes to the emission of the phosphor, which covers the inner space of the lamp bulb. In terms of service life, such energy-saving products outperform traditional incandescent lamps in dozens of times. Currently, the range of produced lamps is extensive, they differ in the form of tubes, power and the type of connection to the supply network.

Fluorescent Compact Lamp

With LED bulbs, the solid is a semiconductor.If you skip email. it generates optical radiation. In the region of the pn junction, some of the energy is discharged in the form of visible light. For the first time such a unique product appeared in 1962, since then its production technology has been improved, and today the market for these products is the most extensive. The efficiency of LED lamps is proven by time.

A variety of LED light bulbs

Match Table

LED lamps are superior to other types of lamps for the following main indicators:

• power consumption;
• light output;
• heat release;
• impact resistance;
• ecological compatibility;
• fire safety;
• term of operation.

Comparative characteristics of lamps by power

The table shows that the electricity consumption of LED products is the smallest, so lighting devices of this type are the most economical. How many lumens are in the lamp? This indicator depends on the power of the light bulb. The flux of light in lumens is indicated in the table.

The color of the light flux in LED products can be very different. It is determined by the chemical composition of the LED. Sometimes for this purpose in a design of a lamp set different light-emitting diodes and optical filters that allows to receive a luminescence in a wide range of a spectrum.

Bulbs are still compared for the following indicators:

• degree of heating;
• vandalism;
• term of operation.

During operation, incandescent and halogen lamps are heated strongly. It is known that a little more than 20% of the power is spent on lighting the incandescent bulb, the rest goes to heat it. Halogen bulbs, respectively, account for 35 and 65%, for luminescent - 75 and 25%, and for light-emitting diodes on the average - 97 and 3%.

On the strength of the design, the most fragile are incandescent and halogen lamps. Bulbs of LED bulbs are made of impact-resistant material and can withstand falling from a small height. Worse is the case with fluorescent lamps, although their body is much stronger than the body of incandescent lamps, but from an ecological point of view, its destruction has a disastrous effect on health. Therefore, they must undergo special disposal.

And, finally, the service life, which is usually indicated in hours. The palm tree belongs again to LED lighting devices. Practically their service life ranged from 25 to 100 thousand hours and it depends on the technology of production, the materials used and the manufacturer. Other types of light bulbs serve much less, for example, incandescent lamps - 1 thousand hours, halogen lamps - 4 thousand hours, luminescent - no more than 10 thousand hours.

Lamp repair. Video

About self-repair energy-saving lamp in detail will tell this video.

The conclusion is one: for all indicators, including design, and it can be very different, LED bulbs are much superior to other types of lamps. The comparative characteristics of the luminaires indicated in the table clearly demonstrate the difference.

The only drawback of these products is high cost. But a long service life and their apparent energy efficiency will pay off quickly. If there is a desire and a need for saving energy consumption, then it is necessary to start with replacing the lamps with energy-saving ones and preferably immediately on LEDs.

Traditionally, household incandescent lamps have a power of 40 to 150 watts. A LED or CFL (compact fluorescent lamp) have a power of only 5 to 15 watts. The reason for this discrepancy in the consumption of energy by lamps - the last generation consumes much less energy.

Now the standard of power is Lumen, not Watt. Lumen is a unit of measurement of brightness, and becomes a more acceptable indicator of lamp power under modern standards. In the graph below, a comparison of watts and lumens of the three most popular types of lamps. The schedule found on the website of the American Lighting Association, translated:

Marketers play with large numbers, but do not forget that 1000 lumens are equivalent to 60 watts. Unfortunately, the technologies themselves (lad, cl, halogen) do not necessarily affect the quality of light, it is more the quality of the product - the lamp itself and the conscientiousness of the manufacturer. Each manufacturer of light-emitting diodes declares an unprecedented brightness of its lamps - our 5 watts shine like 40 watts of incandescent ... This does not always correspond to reality.

The service life of the fluorescent powerhouse on my personal experience did not exceed 3 years of the standard evening load. Well, not 25 times longer they serve than a filament lamp, in any way ... But despite the discrepancy with promises, I prefer still energy-saving in the living room and kitchen.

I did not have a personal experience with LED lamps, and while I'm in a hurry - the price is simply sky-high, even for the most consumer models, which I read in the network so many complaints and frustrated reviews - they flicker, quickly break, then the light greets, then blushes ...