The difference between LED light source and light fixture

1. Definition of LED light source and luminaire
An LED light source is a component that is provided with an LED lamp or LED module. LED luminaires are luminaires that are designed to use LED light sources.

A luminaire is defined as "an apparatus capable of distributing, transmitting or transforming the light emitted by one or more lamps, and includes all the parts necessary to support, secure and protect the lamp (but not the lamp itself) as well as the necessary electrical aids and devices to connect them to the power source."

2. The reason why LEDs are misunderstood as LED light sources
The light sources in conventional luminaires are almost always replaceable. With the advent of LEDs,Most of the lamps using LED modules appear in a non-replaceable form, which seems to show a trend of integration.The boundaries between LED light sources and LED luminaires also seem to be blurred.Is the whole a luminaire and can be considered as a light source? In fact, it is clearly written in the definition of luminaires: a luminaire with a monolithic non-replaceable light source is considered a luminaire. Luminaires using LED modules are precisely one example of luminaires.

3. The light source has the characteristics of being used by different lamps
The light source is used by the luminaire. LED light sources can be used both in simple lamps and in road lamps.

4. Differences in the level of protection of the enclosure
As a light source, there are no special enclosure protection requirements or IP20 should be achieved. However, the enclosure rating of outdoor lighting fixtures should be at least IP65.The enclosure protection level of LED road lamps should reach at least IPX3, and the enclosure protection level of tunnel lamps should reach at least IPX5.

5. Different luminous fluxes
The luminous flux of the light source in the luminous effect of the LED light source refers to the luminous flux emitted by the bare light source (the state in which the luminaire is not yet installed).Among them, the LED light source can be an integrated LED lamp or an integrated LED module,Semi-integrated LED lamps or semi-integrated LED modules or non-integrated LED lamps or non-integrated LED modules.The numerator-one luminous flux in the expression of the efficiency of LED luminaires refers to the light source being installed into the luminaire.

The luminous flux emitted by the luminaire after using the required LED control device or the power supply of the LED control unit at the same time.The power supply of the LED control device or the LED control device can be integral,Built-in or free-standing. Luminaires that use LED light sources may use reflectors, diffusers, or lenses.
The light source installed in the luminaire may be a single light source or a collection of multiple light sources, but the efficiency loss due to the interaction of thermal energy and electrical energy,
and the efficiency of the luminaire optical system, the luminous flux of the LED luminaire 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 luminous flux in the luminaire efficiency in the luminaire performance.
The former is measured in the pulsed state and the latter in the steady-state operating state.
The light in the LED light source is non-directional, as long as the light can be emitted, it is recognized in all directions.
The light in the efficiency of LED lamps is directional, and the light needs to be sent to useful areas.