Sharp Corp. unveiled at its technical presentation meeting in Tokyo that it used green and red fluorescent materials in the GW5BNC15L00 and GW5BNC15L10, high-output white LEDs that the company announced June 26, 2007 (photo).
The LEDs have enhanced color rendering properties for use in lighting equipment.
The red and green fluorescent materials both feature wide wavelength ranges. The general color rendering index (Ra) is about 80. Although products with an Ra of over 90 have already been commercialized by other companies, Sharp claims that a product with a flatter wavelength range can emit more natural light.
The GW5BNC15L00 and GW5BNC15L10 have color temperatures of 5000 and 6500 K, respectively. It is reported that the GW5BWC15L00, a standard white LED, uses a yellow fluorescent material while the GW5DWC15L00, which corresponds to warm white, uses yellow and red fluorescent materials.