Performance index of LED light source
(5) color temperature: expressed at absolute temperature K. Eg. summer, noon, sunshine, 5500K, afternoon, daylight 4000.(6): light intensity measured in candela cd. This amount indicates the ability of the emitter to converge in space, and is a common description of the optical power and convergence ability. Eg. with 5 LED I is about 5mcd.(7) luminous flux: measured by lumen lm. This quantity describes the total amount of light emission from the light source and is equivalent to the optical power. The existing LED 1W luminous flux can be done 80-130lm.(8): light intensity measured in Lux lux. That is uniformly distributed on the surface of the luminous flux of 1 square meters.(9) color rendering: represented by CRI. Eg.Luxeon cold, white, 70, neutral white is 75, warm white is 85.
Half value angle: the intensity of light is half of the peak, 2 times the angle from the center line. According to different applications, they can be classified into high directivity, standard and scattering. Eg.XP-C's half value angle is 110 degrees.
(1) colors: mainly red, green, blue, cyan, yellow, white and amber.(2) current: according to the different power levels, the commonly used LED current is not equal to 20mA-2A.(3) voltage: voltage and color are related, generally red, green, blue VF between 1.8-2.4V, white, blue, green voltage between 3.0-3.6(4) the maximum reverse voltage allowed by the reverse voltage Vrm:LED. Beyond this value, the LED may be damaged by breakdown. It should be noted that some LED are not allowed to reverse (such as OSRAM), and the general Vrm is between 3-5V.
