Advantages:

Phosphors coordinate point 1) white only by their own decisions, has nothing to do with the shock hair crystal slice (discreteness can tolerate the LED chip).

2) can achieve high color reduction index RI.

3) theory is the most simple manufacturing solutions.

4) the stability of the light only depends on the fluorescent powder, can be very stable.

Disadvantages:

1) leakage of uv light damage LED sealant, cause device life problems.

2) light conversion efficiency is not high, its absorption, light transmittance, etc.

The challenge:

1) has not been successful so far.

2) there is no can stimulate the blue phosphors.

3) color will change with the change of observation Angle.

(4) sealant must be able to resist ultraviolet damage.

5) remains to be further improve the stability of the RGB phosphors.