It is said that many people can not distinguish between LED light source and lamps
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Release time:2024-08-20
In the eyes of ordinary people, LED light sources and LED lamps seem to be the same, but in the eyes of professionals, the two concepts are very different.
From a professional point of view, LED light source and LED lamps have a very obvious difference,
This article will be aimed at this difference to carry out a variety of comparative explanation, interested friends come and have a look.
Definition of 1. LED light source and lamp
The LED light source is a component provided as an LED lamp or LED module. LED luminaires are luminaires designed to use LED light sources.
A luminaire is defined as "an appliance that distributes, reveals, or transforms the light emitted by one or more lamps,
and includes all parts necessary to support, secure and protect the lamp (but not the lamp itself),
and the necessary circuit aids and devices to connect them to the power supply."
The reason why 2. LED is misunderstood as LED light source
Almost all the light sources in traditional lamps can be replaced. With the advent of LEDs,
Most of the lamps using LED modules appear in an irreplaceable form and seem to show a trend of integration,
The boundaries between LED light sources and LED lamps also seem to be unclear.
The whole is a light emitter and can be regarded as a light source? In fact, it is clearly written in the "Note" in the definition of the lamp:
A luminaire using an integral non-replaceable light source is considered a luminaire, and a luminaire using an LED module is just an example of a luminaire.
3. light source has the characteristics of being used by different lamps and lanterns
The light source is used by the luminaire. If the light source is compared to the source of water, the lamp is compared to the spring water. LED light sources can be used in both downlights and road lamps.
If "LED street light" or "LED tunnel light" is understood as "light source", it cannot be reused by other lamps, which is contrary to the concept of "light source.
Differences in the degree of protection of 4. enclosures
As a light source, no special enclosure protection class is required or should reach IP20. However, the enclosure protection level of indoor lamps should reach at least IP20,
The enclosure protection level of LED road lamps shall be at least IPX3, and that of tunnel lamps shall be at least IPX5.
The luminous efficiency of 5. LED light source is not equal to the efficiency of LED lamps
As far as light sources are concerned, light efficiency is a classic indicator project,
EveryThe emergence of a new light source is directly related to the higher light efficiency it achieves,
In this way, the light efficiency has become an important indicator of the performance of the LED light source without exception.
Of course, other performance indicators of the light source include color rendering index, color coordinates, color temperature and life, and so on.
For lamps using traditional light sources, the light output of the lamp, that is, the ability of the lamp to convert the luminous flux of the light source,
It is a classic indicator of lamp performance.
Since the performance parameters of LED light sources have not yet reached the level of standardization,
Moreover, the LED light source used in many lamps is not replaceable, so the concept of light efficiency has also been misused in LED lighting products.
6. the concept of LED light source efficiency and LED lamp efficiency
The luminous efficiency of LED light source is defined as the ratio of the luminous flux emitted by the light source to the electric power consumed by itself. The unit is lm/W. It does not include the loss of electrical accessories.
The definition of LED lamp effectiveness refers to the claimed conditions of use of the lamp,
The ratio of the initial total luminous flux emitted by the lamp to the power consumed, in lm/W. It includes the loss of electrical accessories.
"Light efficiency" for the evaluation of LED light source, "efficiency" for the evaluation of LED lamps,
Both the luminous efficiency of LED light source and the efficiency of LED lamps indicate the efficiency of converting electrical energy into light energy,
It is an indicator item that describes the energy-saving characteristics of lighting products, but its connotation is different.
7. different luminous flux
The luminous flux of the light source in the luminous efficiency of the LED light source refers to the luminous flux emitted by the bare light source (the state when the lamp is not installed).
The LED light source can be an integrated LED lamp or an integrated LED module,
Semi-integrated LED lamp or semi-integrated LED module or non-integrated LED lamp or non-integrated LED module.
The molecular-luminous flux in the LED lamp performance expression refers to the light source into the lamp,
At the same time, use the required LED control device or the light flux emitted by the lamp after the power supply of the LED control device.
The LED control device or the power supply of the LED control device can be integral,
Built-in or free-standing. Fixtures using LED light sources may use reflectors, diffuser plates, or lenses.
The light source installed in the lamp may be a single light source or a collection of multiple light sources, but the efficiency loss caused by the interaction of heat and electric energy,
As well as the efficiency of the lamp optical system, the luminous flux of the LED lamp is not equal to the luminous flux of the LED light source or its simple accumulation.
The luminous flux in the luminous efficiency of the LED light source is different from the measurement state of the luminous flux in the lamp efficiency,
The former is measured in the pulse state, and the latter is measured in the steady state.
The light in the light effect of the LED light source is non-directional, as long as the light can be emitted, all directions are recognized.
The light in the efficiency of LED lamps is directional, and the light needs to be sent to useful areas.
In the case of using the same LED light source, the luminous flux of the LED lamp is less than the luminous flux of the LED light source.
8. different input power
The denominator in the LED light source light efficiency table is also different from the denominator in the LED lamp efficiency.
For example, for a non-integrated LED module, the power consumed by the LED light source refers only to the power consumed by the LED module,
Does not include the power consumed by the LED control device. The power consumed in the efficiency of LED lamps refers to the input power of the lamps, including not only the LED light source,
The power consumed by the LED control device is also included. The electrical power consumed by the LED luminaire is greater than the electrical power consumed by the LED light source.
The relationship between the efficiency of 9. LED lamps and the luminous efficiency of LED light sources
Due to the different ranges of luminous flux and electric power involved, the luminous efficiency of LED light source is different from that of LED lamps, and the luminous efficiency of light source is much greater than that of lamps.
One is that after the LED enters the lamp, the junction temperature increases and the light output decreases (heat loss);
The second is the system loss after the light source enters the lamp and uses the LED control device or its power supply;
The third is the loss of light after passing through the lamp optical system, that is, the lamp efficiency (light loss).
From the above analysis, it can be seen that the light efficiency of the light source and the efficiency of the lamp are completely different and cannot be confused.
It can be seen that there are obvious differences between LED lamps and LED light sources in terms of luminous flux, input power and protection level.
It can be seen that the conceptual difference between lamps and light sources is still very obvious.
Zhongshan Quanhui Outdoor Lighting Co., Ltd.Founded in 2004, it is a comprehensive lighting enterprise integrating production, sales and installation,
20 years focused on production:Municipal street lamp,landscape lamp,Garden lights,high pole lamp,Smart street lampSuch as outdoor landscape lighting lighting project.
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Guangdong Quanhui Lighting Co., Ltd
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