LED lighting device, has luminescence conversion element absorbing portion of blue light and converting blue light into secondary light, and additional set of light sources constructed of LEDs with wavelength greater than preset value

摘要

The device has a set of light sources constructed of blue LEDs with an added luminescence conversion element, where blue light comprises predominating wavelength in the region between 430 nanometer (nm) and 460 nm. The luminescence conversion element absorbs portion of the blue light and converts the blue light into secondary light with peak wavelength ranging between 520 nm and 545 nm. Additional set of light sources is constructed of LEDs with predominating wavelength greater than 600 nm.