A phosphor composition and a lamp having a phosphor film formed of the composition. The composition contains red, green and blue luminescence components. The blue component emits blue light by the excitation of 253.7-nm ultraviolet light. It has a main luminescence peak wavelength of 460 to 510 nm, and...http://www.google.fr/patents/US5049779?utm_source=gb-gplus-shareBrevet US5049779 - Phosphor composition used for fluorescent lamp and fluorescent lamp using the same
Phosphor composition used for fluorescent lamp and fluorescent lamp using ...
