Why the LED lamp (white light) edge hair blue light shone on the wall

Answer:

You should like a supplier to a white color partition table, their factory or ask them to provide samples of the XY coordinate interval, when you order it to the manufacturer required to provide the range of white light

Therefore describe white LED color generally mild corresponding color area of x and y coordinates on chromaticity diagram, rather than general said the white light, a lot of people to describe you need white color temperature, actually also is not accurate, color temperature on the chromaticity diagram is a linear value, a color temperature value corresponds to a variety of colors.

But so far no can emit white chips, so common technique is to use the blue color chip now covered with a layer of fluorescent powder mixed white light, so the number of the wavelength of the blue light and fluorescent powder, the uniformity of phosphor coverage on a chip will interfere with leds emit white light color, such as less phosphors may be blue, for example, the yellow, middle high edge will be blue or blue.

Leds emit light color is determined by the chip, such as red, green, blue, yellow, the color when ordering samples as long as pay attention to the order of the wavelength and wavelength agree, can guarantee the same color.