In order to give a better understanding of LED PKG, today we will focus on sharing the basic professional terms of LEDs.

Commonly used LEDs:

Voltage: It’s called for potential difference,and it is a physical quantity that measures the energy difference of a unit charge in an electrostatic field due to different potentials. The magnitude of the voltage from one point to another is equal to the work done by the unit positive charge moving from one point to another due to the force of the electric field. The direction of the voltage is defined as the direction from high potential to low potential. The international unit of voltage is volts (V, volts for short). The normal voltage of the MOONLIGHT’s LEDs is 3V (2.8-3.4V), but the red/orange light is 2V (1.8-2.4V). Under the same conditions, the greater the current, the greater the voltage. At the same time, there are also high-voltage LEDs, such as 9V/18V.

Current: In electromagnetism, the amount of electricity passing through any cross-section of a conductor per unit time is called current intensity, referred to as current (Electron current), the symbol of current is I, and the unit is ampere (A), referred to as "ampere". Looking at the LED power, our company produces LED lamp beads from 5MA to 1500MA.

CRI: In order to quantitatively evaluate the color rendering of the light source, the concept of color rendering index is introduced. Taking the standard light source as the criterion, its color rendering index is set as 100, and the color rendering index of other light sources are all lower than 100. Conventional is 80RA. There are also some customers who require 90RA or 95RA.

Lumen: The unit of representation of luminous flux, that is, the energy perceptible to the human eye radiated by the light source to the surrounding space in a unit of time. The symbol is Φ, and 1 lumen is equivalent to the energy radiated by a monochromatic light source of 1/680W.The unit is for LM.

Beam angle: The beam angle is also called the power angle. Usually, we use the half-power angle, that is, the angle of 50% luminous intensity, which is recorded as 2&1/2. The light-emitting angle of LEDs is generally 120 degrees, and there are also 30 degrees, 45 degrees, 60 degrees, 90 degrees and so on with lenses.

Light decay: Light decay generally refers to its luminous flux. When charging the surface of the photosensitive drum, as the charge accumulates on the surface of the photosensitive drum, the potential continues to rise, and finally reaches the "saturation" potential, which is the highest potential. The surface potential will decrease over time. Generally, the potential during operation is lower than this potential. The process of this potential naturally decreasing with time is called the "dark decay" process. When the light decay is greater than 30%, we call it economic life; when the light decay is greater than 50%, we call it a "dead lamp" in a certain sense.

Wavelength: Wavelength refers to the wavelength of light emitted by LEDs of different colors. For example, the wavelengths of various colors are as follows: the wavelength of red light is 620-660 nanometers, the wavelength of green light is 510-550 nanometers, the wavelength of yellow light is 580-595 nanometers, and the wavelength of orange light is 580-595 nanometers. The wavelength of light is 600-610 nanometers, and the wavelength of blue light is 450-480 nanometers. The above list is the wavelength range in a certain luminous efficiency. It can be seen from the brown red orange yellow green blue purple that the wavelength is getting shorter and shorter.

Color: conventional colors are warm white: 2800-3200K; natural white: 4000-4500K; white: 6000-6500K; blue light: 460-470NM; green light: 515-525NM; yellow light: 585-595NM; orange light 600 -610NM; red light: 620-630NM; plant red: 660-665NM; infrared 850/940NM, etc.

In addition to the above conventional parameters, LED lamps also have the following commonly used parameters:

Power: a physical quantity that indicates how fast an object does work. In physics, power P=work J/time t, the unit is watt W. Power calculation formula: 1.P=W/t (average power) 2.P=F*V

Luminous efficiency: The ratio of the luminous flux emitted by the light source to the power consumption is called luminous efficiency, and the unit is lumens/watt. Different light sources emit the same luminous flux, the less power consumed, the higher the luminous efficiency [1] . The higher the luminous efficiency value, the stronger the ability of the lighting fixture to convert electrical energy into light energy, that is, the stronger the energy saving of the lighting fixture under the condition of providing the same brightness; the better the lighting property of the lighting fixture under the same power. Strong, that is, the greater the brightness.

Illuminance: Illumination intensity refers to the energy of visible light received per unit area, referred to as illuminance [1] , in lux (Lux or lx). A physical term used to indicate the intensity of light and the amount of light on the surface area of an object.

Color consistency: After the LED lights are produced, the light is divided according to voltage/current/brightness/XY, etc., so that they can be divided into multiple BINs. In order to ensure color consistency, it is necessary to use LEDs of the same batch/BIN leds.