In Line Led 3Mm red and green double-color

Common sense of LED brightness (intensity):

　　1. Definition of candlelight, international candlelight and candela

Under the standard atmospheric pressure of 101325 Newtons per square meter, an absolute "black body" with an area equal to 1/60 square centimeter (that is, an ideal object that can absorb all external light without reflection), at the solidification temperature of pure platinum (Pt) (about 2042K) At 1769℃), the luminous intensity along the vertical direction is 1 candela. Moreover, the three concepts of candlelight, international candlelight, and candela are different and should not be equal. In terms of quantity, 60 candela is equal to 58.8 international candles, and 1 candela of Hefner lamp is equal to 0.885 international candles or 0.919 candela In-line Lamp Beads.

　　 2. Luminous intensity and brightness

　　 Luminous intensity is abbreviated as light intensity, and the international unit is candela (Candela) abbreviated cd. Lcd refers to the luminous flux emitted by the light source within the unit solid angle of the specified direction. When the light source radiation is uniform, the light intensity is I=F/Ω, Ω is the solid angle, the unit is steradian (sr), F is the luminous flux, the unit is lumens, and for point light sources, I=F/4. Luminous brightness refers to the brightness of the light-emitting surface, which refers to the ratio of the luminous intensity of the light-emitting surface in a specified direction to the area of the light-emitting surface perpendicular to the specified direction, and the unit is candela/square meter 3W High Power Lamp Beads. For a diffuse scattering surface, although the light intensity and luminous flux in each direction are different, the brightness in each direction is equal. The fluorescent screen of the TV is similar to such a diffuse scattering surface, so the image from all directions has the same sense of brightness High Power Lamp Beads 1W.

　　3.mcd value

　　Mcd value is an irregular name in the industry. Because of the different test instruments of different manufacturers, the measured mcd value of the same product is not the same. In the actual sales process, the two most commonly encountered concepts are lumens and brightness (mcd) values. As a salesperson, you don't need to fully understand the technology, but you need to keep in mind the mcd value of our conventional low-power Led Lights (subject to the parameters listed in the quotation) High-Power Led Lamp Beads.