Pr3+/Ho3+ co-doped fluorozirconate glasses were prepared and their luminescence properties studied. Blue, green and red luminescence in the wavelength region of 470–750nm were achieved in these glasses under 443nm light-emitting diode (LED) excitation. The ratio of Pr3+–Ho3+ was changed in order to determine the appropriate combination for realizing color-controlled white LEDs. The color temperature of the white light can be adjusted by changing the LED-excitation wavelength or the ratio of the Ho3+/Pr3+ ions. Thus, Pr3+/Ho3+co-doped fluorozirconate glasses are potential materials for use in white LEDs.