LED: Light Emitting Diode light emitting diode is a pn junction diode that converts electrical energy into visible light as well as optical radiation in the infrared or ultraviolet part of the spectrum.
COB LED module: Chips on Board is a common module consisting of one or more LED chips located on a board.
Lm / W: lumen per watt. Lumen value emitted from the light source or luminaire divided by the total energy consumption. Also known as efficacy.
CCT: Correlated Color Temperature is the closest color temperature. Whether the light is perceived as warm, neutral or cool white.
CRI: Color Rendering is the color rendering index. A measure of how well a light source transmits colors. Also known as Ra.
Luminous flux: the amount of light coming from a light source or luminaire.
What is an LED?
LED: Light-Emitting Diode, a light-emitting diode, is an electronic component that produces light in a semiconductor material. The LED converts electrical energy into visible light as well as optical radiation in the infrared or ultraviolet part of the spectrum. The forward voltage of an LED depends on its color – for longer wavelength LEDs (red) it is of the order of 2 V, for shorter wavelength (blue) it is ~ 3 V.
Earlier LEDs emitted low-intensity red light, but today’s LEDs are already available in different wavelengths, emitting infrared light to ultraviolet light, with a very high degree of brightness.
The invention and development of high-power white LEDs led to the use of light emitting diodes in the field of lighting, becoming a serious competitor to incandescent and fluorescent lamps.
What is COB?
COB LED Modules – COB: (Chips on Board) – is a common module consisting of one or more LED chips (usually nine or more) located on a ceramic or aluminum plate.
According to the technology, the shell-free blue diode chips are mounted directly on the chip and covered with a common phosphor layer. In this case, the heat dissipation from the transfer is significantly improved, which prolongs the life of the device.
What is CCT?
Light Temperatures – CCT: Correlated Color Temperature
Color temperature indicates whether the light source is perceived as warm, neutral, or cool white. LEDs can be manufactured at any color temperature determined by the predominant wavelengths. The color temperature of an LED is characterized by blue and yellow peaks in the spectrum.
CCT is measured in Kelvin. LED luminaires are most often used at light temperatures of 2500-6000K. When choosing the light temperature, you should keep an eye on what kind of atmosphere you want to achieve. 3000-4000K is best suited for displaying products in retail spaces, 2700-3000K in smaller interiors such as homes.
- 2000 Kelvin yellow warm candlelight
- 2700 Kelvin natural evening sunlight
- 3000 Kelvin morning sunlight
- 3500 Kelvin noon sunlight
- 4000 Kelvin semi-cloudy cold light
- 4500 Kelvin cloudy noon blue light
- 5000 Kelvin strong daylight with a bluish overtone
- 6000 Kelvin Powerful daylight with a strong bluish overtone
What is CRI?
CRI: color rendering is a color rendering index that is an indicator of light quality.
The color rendering of the luminaire is numerically expressed by a color rendering index with a maximum value of 100 corresponding to the natural color rendering, such as in sunlight. If vision work requires correct color recognition, the color rendering index must be at least 80-90.
A higher CRI number ensures less color distortion. If there is no part of the spectrum in the light, the colors corresponding to that part of the object appear gray or dim.