Visible photoluminescence properties of praseodymium ions in rare-earth aluminum phosphate 5. 8Li2O-3CaO-5BaO-16Al2O3-4. 2La2O3-66P2O5( LCBALP) glass were investigated and the absolute fluorescence spectra were measured and calibrated in an integrating sphere. The spontaneous emission probability and the maximum stimulated emission cross-section corresponding to the1D2→3H4transition are 926. 5 s- 1and 3. 5 × 10- 21cm2,respectively. Under the blue LED excitation,the radiant flux and the luminous flux for the visible emission bands of LCBALP glass are identified to be 112. 6 μW and 29. 7 mlm,respectively. The total quantum yield for the visible fluorescence is determined to be 4. 1%. The spectral evaluations of praseodymium ions in optical glass provide a reliable reference in developing optoelectronic devices and compact lighting sources.