Merchant & Gould P.C.
Fluorescent lamp and luminaire with improved illumination light in a low color temperature region
A fluorescent lamp includes a phosphor layer containing a blue phosphor having an emission peak in the 440 to 470 nm wavelength range, a green phosphor having an emission peak in the 505 to 530 nm wavelength range, a green phosphor having an emission peak in the 540 to 570 nm wavelength range, and a red phosphor having an emission peak in the 600 to 670 nm wavelength range. The ratio I1/I2 of the emission peak energy I1 in the wavelength range of 505 to 530 nm to the emission peak energy I2 in the wavelength range of 540 to 570 nm is not less than 0.06. The color temperature of the lamp is not more than 3700 K.
Matsushita Electric Industrial Co., Ltd.
H
H01J
inventional
Toru Hiromi Tetsuji Kenji Toshio
Higashi Tanaka Takeuchi Mukai Mori