Is it a light source or a light fixture? Don't be stupid again!

What is the LED in the LED luminaire that refers to the LED light source? Or LED lights? I think many people still haven't figured out that LED light sources and LED lights are stupid. Now let's go and see it out.

First, the definition of LED light source and LED lamps

1, LED light source

LED light source; a component provided by an LED lamp or LED module.

LED lamp: A light source with a lamp head that combines one or more LED modules. The LED module cannot be removed unless permanently damaged.

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Figure 1 Diagram of the type of LED light

2, LED lamps

LED luminaire; luminaire designed to use LED light sources.

A luminaire is defined as an appliance that distributes, reveals, or transforms one or more lamps, and includes all components necessary to support, secure, and protect the lamp (but not the lamp itself), and the necessary circuitry. Auxiliary devices and devices that connect them to a power source."

Second, LED LEDs are misunderstood as LED light sources

Light sources in traditional luminaires are almost always replaceable. With the advent of LEDs, most of the luminaires using LED modules appear in an irreplaceable form, which seems to be an integrated trend. The boundaries between LED light sources and LED luminaires seem to be unclear.

The whole is an illuminator, can be regarded as a light source? Actually, it is clearly stated in the "Note" in the definition of the luminaire: an illuminator using an integral non-replaceable light source is regarded as a luminaire, and a luminaire using an LED module is just an example of a luminaire.

Third, the light source has the characteristics of being used by different lamps

The light source is used by the luminaire. If the light source is like a source water, the light fixture is like a spring water. LED light sources can be used both in downlights and in road lights.

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" using "lighting".

Fourth, the difference in the degree of protection of the enclosure

As a light source, there is no special enclosure protection rating or IP20. However, the enclosure rating of indoor luminaires should be at least IP20, and the enclosure protection rating of LED road luminaires should be at least IPX3. The enclosure protection rating of tunnel luminaires should be at least IPX5.

Five, LED light source efficacy is not equivalent to LED lamp performance

As far as the light source is concerned, light efficiency is a classic indicator project. The appearance of each new light source is directly related to the higher light efficiency achieved. Thus, the light effect 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, chromaticity coordinates, color temperature and lifetime.

For lamps using traditional light sources, the light output of the luminaire, ie the ability of the luminaire to convert the luminous flux of the luminaire, is a classic indicator of luminaire performance.

Since the performance parameters of LED light sources have not yet reached the standardization level, and the LED light sources used in many lamps are not replaceable, the concept of light effects has also been misused to LED lighting products.

1, LED light source efficacy and LED lighting efficiency concept

The luminous efficacy of a source is defined as the ratio of the luminous flux emitted by a light source to the electrical power consumed by itself. The unit is lm/W. It does not contain the loss of electrical accessories.

The luminaire efficacy definition is the ratio of the initial total luminous flux emitted by the luminaire to the power consumed by the luminaire under the claimed conditions of use, in lm/W. It is the loss of electrical accessories.

"Light efficiency" is used to evaluate LED light source. "Efficacy" is used to evaluate LED lamps. LED light source efficacy and LED lamp efficiency all indicate the efficiency of converting electrical energy into light energy. It is an index item describing the energy-saving characteristics of lighting products, but its connotation It is different.

2, different luminous flux

The luminous flux of the light source in the light source of the LED light source refers to the luminous flux emitted by the bare light source (the state when it is not yet installed in the luminaire). The LED light source may be an integrated LED lamp or an integrated LED module, a semi-integrated LED lamp or a semi-integrated LED module or a non-integrated LED lamp or a non-integrated LED module.

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