5MM piranha Light Emitting Diode In-line

Spectral power distribution of white LED

The spectral power distribution of 　　 white light LED represents the function of radiant power varying with wavelength. It not only determines the color of light emission, but also determines its luminous flux and color rendering index. Usually the relative spectral power distribution is expressed by the text S(λ). When the spectral power drops to 50% of its value along both sides of the peak, the difference between the two corresponding wavelengths (Δλ=λ2-λ1) is the spectral band High-Power Purple Lamp Beads.

Chromaticity coordinates of white LED

For the three primary colors red (R), green (G), blue (B), x=R/(R+G+B), y=G/(R+G+B), z=(R+G+B) . Since x+y+z=1, only the values of x and y can be given to uniquely determine a color, which is commonly referred to as the chromaticity diagram. If using x and y as the plane coordinate system, the x and y values of various colors in nature are measured by the colorimetric experiment method, and the chromaticity diagram can be obtained by plotting them on the coordinate plane. Any point on the tongue-shaped curve on the edge of the chromaticity diagram represents the hue of a certain wavelength of light, and any point in the curve represents a certain color of mixed light that can be seen by the human eye. Among them, the color temperature values of the color coordinate values of the characteristic points A., B, C, D, and E of the white light area are shown in the following table Light Emitting Diode Lamp Beads.

The color temperature and color rendering index of white LED

　　 For light sources that emit white light, such as white LEDs, the chromaticity coordinates can accurately express the apparent color of the light source, but the specific values are difficult to associate with the accustomed light color perception. People often refer to light colors that are more orange-red as "warm colors", and those that are more blazingly white or slightly blue are "cold colors". Therefore, it is more intuitive to use color temperature to express the light color of the light source High Power Lamp Beads 1W.