Tag Archives: LED parameters

Main indicators and parameters of LED selection缩略图

Main indicators and parameters of LED selection

1, brightness
LED light brightness is the most concerned about the topic of the user, brightness can be explained from two aspects.
Brightness L: luminous flux of the luminous body in a specific direction unit stereo angle unit area. Unit: Nitrode (cd/㎡).
Luminous flux φ: the sum of the amount of light emitted by the luminous body per second. Unit: lumens (Lm), said the luminous body of the number of light-emitting, light-emitting the more lumens the greater.
Usually LED lights are labeled with luminous flux, users can judge the brightness of LED lights according to the luminous flux. The higher the luminous flux, the higher the brightness of the light.
2, wavelength
Wavelength consistent LED, color consistent. No LED spectrophotometer producers are difficult to produce pure color products.
3, color temperature
Color temperature is a unit of measurement to identify the color of the light, expressed in K value. Yellow light is "3300k below", white light is "5300k above", there is a kind of intermediate color "3300k-5300k".
4, leakage current
LED is a unidirectional conductive light emitter, if there is a reverse current, it is called leakage, leakage current is large LED, short life.
5, anti-static ability
Antistatic ability of the LED, long life, and therefore high prices. The market market many fake and shoddy products in this one do very bad, this is also expected how many years of life, greatly shortened the root cause.

Main indicators and parameters of LED selection插图

The choice of LED lamps and lanterns includes the appearance, heat dissipation, light distribution, glare, installation and so on. We do not talk about the parameters of the lamps and lanterns today, only about the light source: you really will pick a good LED light source? Light source parameters are: current, power, luminous flux, light decay, light color, color rendering. Our focus today is to talk about the last two, first briefly talk about the first four.

  In general, redundancy = waste, but for the LED operating current is saving. In the case of the drive current to the rated allowable maximum, reduce the drive current by 1/3, the sacrifice of luminous flux is very limited. Yet the benefits are enormous:

  Light attenuation is greatly slowed;

  Lifetime substantially extended;

  Significant improvement in reliability;

  Higher power utilization.

  Therefore, a good LED light source, drive current should be used about 70% of the maximum rated current.

  In this case, the designer should directly request the luminous flux, as for what wattage to use, should be decided by the manufacturer itself. This will promote the manufacturers to pursue efficiency and stability, rather than just go to push up the wattage of the light source, at the expense of efficiency and longevity.

  The above mentioned includes these parameters: current, power, luminous flux, light decay. There is a close correlation between them, the use of attention: which is what you really need?

  Light color

Lamp beads, driver, housing, size, luminous flux, a few meters of illumination, rated power, actual power, power factor, color rendering index, color temperature, ambient temperature and light decay.
Main parameters of led lamp beads:
Small power lamp beads: red and yellow: 1.8-2.4V. blue green and white: 3-3.6V. rated current are 20mA.
High-power lamp beads: 1 watt: 3-3.6V, 350 mA.

Main indicators and parameters of LED selection插图2

1, LED with the aspect of very square, can be used in lighting, as well as indicators, decoration and so on.
2, LED lamp current is DC, LED lamp voltage is not the same, each has its own voltage, such as white light, green light, blue light, are in the 3-3.5V, its normal luminous brightness is 20MM on it, you use 9V voltage plus a little light, then, with {(9 - lamp voltage) / 0.02A (mA to A) = to connect the resistor, connected to the 12V is also the same.
3, red light voltage is 1.8-2.1V wavelength 610-620
Green light voltage is 3.0-3.5V wavelength 520-530
Blue light voltage is 3.0-3.5V wavelength 460-470
White light voltage is 3.0-3.5V no wavelength

Although some factories, power plants and other enterprises and institutions have not used LED lights for industrial lighting, but for LED lights, I believe that you will not have heard of the arrival of the LED lighting era, incandescent lamps and energy-saving lamps will be eliminated, which is the inevitable result of technological progress.

  LED lights and traditional lights in the performance is very different, especially industrial lighting led lights. So users in the procurement of how to choose a good, suitable for industrial lighting LED lights, the following industrial lighting LED lights on several parameters for a brief introduction.

  1, brightness

  LED lamp brightness is the user's most concerned about the problem, brightness can be explained from two aspects.

  Brightness L: luminous flux of the luminous body in a specific direction unit stereo angle unit area. Unit: Nitrode (cd/㎡).

  Luminous flux φ: the sum of the amount of light emitted by the luminous body per second. Unit: lumens (Lm), said the luminous body of the number of light-emitting, light-emitting the more lumens the greater.

  Usually LED lights are labeled with luminous flux, users can judge the brightness of LED lights according to the luminous flux. The higher the luminous flux, the higher the brightness of the light.

  2, wavelength

  Wavelength consistent LED, color consistent. No LED spectrophotometer manufacturers are difficult to produce pure color products.

  3, color temperature

  Color temperature is a unit of measurement to identify the color of the light, expressed in K value. Yellow light is "3300k below", white light is "5300k above", there is a kind of intermediate color "3300k-5300k". Of course, the user can choose the appropriate color temperature according to the lighting application environment and operator needs.

  4, leakage current

  LED is a unidirectional conductive light emitter, if there is a reverse current, it is called leakage, leakage current is large LED, short life.

  5, anti-static ability

  Anti-static ability of the LED, long life, and thus high prices. Many fake and shoddy products on the market in this one do very poorly, which is also expected to how many years of life, greatly shortened the root cause.

  6, life expectancy

  The key to different qualities is life expectancy, life expectancy is determined by the light decay. Small light decay, long life, the real quality of the LED lights have done almost no light decay, which is the industry's top level, the industry's vast majority of LED light manufacturers can not reach.

  7, design

  Each product will have a different design, different design for different purposes, the reliability of the LED lamp design aspects include: electrical safety, fire safety, applicable environmental safety, mechanical safety, health safety, safe use of time and other factors.

  8、Protection level

  IP is the abbreviation of Ingress, Protection, IP rating is for electrical equipment enclosure for foreign body intrusion protection level, such as: explosion-proof appliances, waterproof and dust-proof appliances, the source of the International Electrotechnical Commission's standard IEC60529.

  The protection level is mostly expressed as IP followed by two numbers, which are used to specify the level of protection. The first number indicates the extent to which the equipment is resistant to fine dust, or the degree to which people are protected from hazards in a sealed environment. This represents the level of protection against the ingress of solid foreign objects, with the highest level being 6. The second number indicates the extent to which the device is waterproof. It represents the level of protection against water ingress, and the highest level is 8.

  Of course, the parameters of LED lights are more than these, such as strobe, heat dissipation, light efficiency, etc. are relevant parameters to judge the quality of LED lights.

  Users should understand that the choice of LED lamps can not be like choosing incandescent lamps only look at the wattage, LED lamps wattage has been unable to accurately interpret the brightness of the LED lamps, high luminous efficacy of the low wattage may be brighter than the high wattage of the LED lamps. This is the LED era, only with its parameters to choose a good quality industrial lighting LED lights.