The main features of LED lighting are long life, small volume, small thermal radiation, energy conservation, environmental protection, long wave band, and so on.
For LEDS are new type of light source, and have short history, it still need to constantly improve in the field of lighting research and the development of production technology. At present countries has no complete industrial standards, this has brought the use of LED lamps and promote, uneven quality of products and prices have also increased the lighting designer’s work. How to choose the suitable LED lighting products:
First of all, from the outside appearance evaluation
A qualified products must has reasonable structure, fine surface treatment, structural and functional parts matching, has clear complete product labeling, lamps and lanterns size conform to use visual dimension of the space, including packaging and product specification.
Second, the light source
Due to technical constraints now most high quality light source in the United States, Japan, Taiwan has good feedback. Different quality of LED chip is key to longevity, the color difference between temperature, photosynthetic efficiency, and the emitting Angle control. Under the condition of lighting-off visual difficult to distinguish between high quality light source, usually require manufacturers to provide technical parameters.
Third, the drive power supply
Many people compare the drive power to people’s heart.Ffirst audit the parameters, because the LED volt-ampere characteristic has the characteristics of negative temperature coefficient, and is not fixed, will change with the temperature. The main parameters as the input voltage, output voltage, output current, output power, power factor, wiring signs, temperature rise, have over-voltage protection, over-current protection, and so on.
Fourth, heat dissipation
LED is more sensitive to temperature, so you need to review the radiator, in theory, USES the aluminum radiator material is more appropriate, also distinguish between insert car aluminum, aluminum, cast aluminum. The radiator with the light source and aluminum plate and aluminum shell area of contact between each other, will directly affect the core temperature of LED chip conduction and heat dissipation.
Last, light test
Under normal circumstances, the lighting designer need to light a lamp test to review the samples. Color temperature, brightness, light spot shape, beam Angle, the lamp body temperature are lighting designer’s review details, the final test this link effect due to the light. Here you can intuitive judgment whether to match the design effect of lamps.