White light-emitting diodes were fabricated by phosphor conversion. The blue LED chip (470nm

GaN based) was used as primary light source and Y

3

Al

5

O

12

:Ce

3+

(YAG) phosphors was used as light changing materials. The excitation spectrum peak of the phosphor is the same as the luminescent peak of blue chip at 470nm. The PL spectrum peak of the phosphors is at 570nm. The white light was yielded by mixing 470nm with 570nm. The luminescent intensity of white LED is 2890mcd. The color coordinates of white LED is

x

=0.29

y

=0.33 and the color index is 77. The efficiency of the white LED is 149lm/W. The light conversion efficiency of phosphors is 269 from blue LED to white LED. The white LEDs with different color temperature from 2700～8000K were fabricated. The relationship between the color temperature and the color coordinates of white LED was investigated. When the color temperature is under 3700K

the color coordinates

x

and

y

are bigger than 0.4. When the color temperature is above 8000K

the color coordinates

x

and

y

are smaller than 0.3. When the color coordinates

x

and

y

are 0.33 respectively

the color temperature is about 5500K.