Illumination device for lighting different materials e.g. newsprint, has white light comprising color rendering index and blue light portion, where peak wavelength of blue light portion is provided with specific nanometer

摘要

The device has a light source (1) provided with an LED (11) and a white light (2), where color temperature of the white light is between 3300-5000 K. The white light comprises a color rendering index and a blue light portion (21), where peak wavelength of the blue light portion is 445 Nm. The white light comprises a bluish green light portion (22), where peak wavelength of the bluish green light portion is between 515 - 535 Nm. A yellow-green light portion (23) is provided in the white light. Peak wavelength of the yellow-green light portion is between 580-600 Nm.