R9 99CRI means this particular LED scores 99 out of 100 doing that. Standard red phosphors are ‘red nitrides’, producing oranges and reds from 620 to 670nm. Intematix has a range of red nitrides and, ...

Therefore, LEDs emitting red light cannot be used for white-light generation using phosphors; instead a short-wavelength ultraviolet, violet or blue LED is required. Early attempts to produce blue ...