1. Forward working current If:
It refers to the forward current value of the light-emitting diode when it emits light normally. In actual use, the IF should be selected below 0.6·IFm according to the needs.
2. Forward working voltage VF:
The operating voltage given in the parameter table is obtained at a given forward current. It is generally measured when IF=20mA. The forward working voltage VF of the light-emitting diode is 1.4-3V. As the outside temperature increases, VF will decrease.
3.V-I features:
The relationship between the voltage and current of the light-emitting diode, when the forward voltage is less than a certain value (called the threshold), the current is extremely small, and no light is emitted. When the voltage exceeds a certain value, the forward current increases rapidly with the voltage and emits light.
4. Luminous intensity IV:
The luminous intensity of the light-emitting diode usually refers to the luminous intensity in the direction of the normal line (for cylindrical light-emitting tubes, it refers to its axis). If the radiation intensity in this direction is (1/683) W/sr, it will emit 1 candela (symbol cd). Since the luminous intensity of the general LED is small, the luminous intensity is often used as a unit of candle light (candela, mcd).
5. LED light-emitting angle:
-90°- +90°
6. Spectral half-width Δλ:
It represents the spectral purity of the light-emitting tube.
7. Half-value angle θ1/2 and viewing angle:
θ1/2 refers to the angle between the direction where the luminous intensity value is half of the axial intensity value and the luminous axis (normal direction).
8. Full shape:
The angle converted from the solid angle of the LED light emission is also called the plane angle.
9. Perspective:
Refers to the maximum angle of LED light emission, according to different viewing angles, the application is also different, also known as the light intensity angle.
10. Half shape:
The angle between the normal direction of 0° and the maximum luminous intensity value/2. Strictly speaking, it is the angle corresponding to the maximum luminous intensity value and the maximum luminous intensity value/2. The LED packaging technology results in that the maximum luminous angle is not the light intensity value of 0° in the normal direction, and the deviation angle is introduced, which refers to the angle between the angle corresponding to the maximum luminous intensity and the normal direction of 0°.
11. Maximum forward DC current IFm:
The maximum forward DC current that is allowed to be applied. Exceeding this value can damage the diode.
12. Maximum reverse voltage VRm:
The maximum reverse voltage allowed. Exceeding this value, the light-emitting diode may be damaged by breakdown.
13. Working environment topm:
The ambient temperature range in which the light-emitting diode can work normally. Below or above this temperature range, the light-emitting diode will not work properly, and the efficiency will be greatly reduced.
14. Allowable power consumption Pm:
The maximum allowable value of the product of the forward DC voltage across the LED and the current flowing through it. If this value is exceeded, the LED will heat up and be damaged. High energy saving: constant voltage DC drive, the same lighting effect saves more than 80% compared with traditional energy-saving light sources, which can produce huge economic benefits.
Long life: LED lights are also called never-extinguishing lights, solid cold light sources, epoxy resin encapsulation, no loose parts of the lamp body, no filament burnout, heat sink, light decay and other shortcomings, with a service life of up to 5W-10W Hour.
Benwei Lighting is an LED Tube, LED flood light, LED Panel Light, LED High Bay, LED manufacturer with 12 years of experience. If you want to purchase a high-quality LED flood light or have a more in-depth understanding of the application of LED flood lights, please contact send us inquiry， our web: https://www.benweilight.com/.
