The difference between LED lamp and the traditional light source lamp

Nowadays the life of the traditional light source performance measurement and evaluation have been standardized, and are interchangeable, so that the life span of the traditional source of lamps and lanterns is by replacing the damaged light source, and according to the light in the life of 10 years design control devices to meet the requirements, so don’t usually evaluation of traditional light source of lamps and lanterns of the life. Life span of the LED lamps and lanterns and LED life itself, the LED driver and LED lamps and lanterns is provided to the environment, and many other factors, and the LED lights form is more, except with a standard lamp holder LED other LED lights are not interchangeable, to a variety of LED lamps and lanterns, so its life only through the life of the related evaluation to determine. In the evaluation of LED lamps and lanterns of life, not only to claim that optic (LX) to maintain life, also claims that the failure rate (FX).
Lamps and lanterns can take advantage of the luminous flux rate and traditional lamps and lanterns of different evaluation parameters. Traditional lighting lamps and lanterns USES to evaluate efficiency of lamps and lanterns, and LED street light USES photosynthetic efficiency evaluation.
The LED lamps and lanterns and the traditional light source lighting performance, evaluation and design there are many different places.
In the aspect of the performance evaluation of the LED lamps and lanterns
A) color space uniformity evaluation to evaluate the LED lamps and lanterns of observation Angle different color differences.
The characteristics of the traditional light source of a single light, LED lamps and lanterns of using LED lights is more light and light, LED lamps and lanterns of the light, and color difference between need to use the color space uniformity evaluation to evaluate the spatial distribution of LED lamps and lanterns of color.
B) unlike traditional lighting light source can be a photometric test alone, photometric measurement can be used when the relative method, LED light source is extremely sensitive to temperature, not suitable for the LED light from lamps and lanterns in isolated individual measurement, photometric absolute method should be adopted when the photometric test was carried out on the whole of lamps and lanterns.
In LED lamps and lanterns design
LED lamps and lanterns in the optical system design, electrical accessories, cooling measures and structure design aspects, such as compared with the traditional light source of lamps and lanterns has obviously don’t.
The optical system is the soul of the lamps and lanterns of lamps and lanterns, the purpose of which is according to the properties of the light source is selected to design a meet the requirements of the specific lighting lamps and lanterns of the optical system. Usually the traditional light source, the optical system by the light source of lamps and lanterns, lamp holder, reflector, and light cover. Due to some LED unit with two PI photometric characteristic of light, the optical system of lamps and lanterns is very different with the traditional light source lamp. Specific performance characteristics are as follows:
A) LED lamps and lanterns of the optical system generally consists of LED chips and lenses of LED units or LED array, sometimes arranged in array flat aluminum substrate, may under the protruding or concave molding substrate, lamps and lanterns use, or do not use the pervious to light cover. Can according to the requirements of lighting lamps, LED unit or multiple dozens of LED unit combination on the base board, attention should be paid to control the consistency of the combination unit of LED street light color after examination of the LED lamps and lanterns of the color space of evenness.
B) due to the LED photoelectric properties are very sensitive to the change of PN junction temperature; Encapsulating resin under high temperature and strong light irradiation can rapid degradation; Long-term radiation can make phosphor conversion rate of performance to reduce gradually, and will cause the color coordinates deviation. Evaluation of the life of the LED lamps and lanterns is usually under the condition of limited color offset, lumen maintenance ratio of assessment of LED lamps and lanterns.

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