In　this　work,　a　phosphor　for　white　light-emitting　diode　(LED)　application,　Ce3+　-doped　yttrium　aluminum　garnet　(YAG:Ce3+),　was　successfully　packaged　using　a　P2O5-ZnO-Na2O-Al2O3　glass-ceramic　system,　through　a　vertical　deposition　method.　Here,　we　found　that　white　light　can　be　achieved　by　combining　the　packaged　phosphor　with　a　blue　chip　(e.g.　InGaN).　The　specimen　doped　with　4　mol%　Al2O3　showed　a　luminous　efficacy　(LE)　of　125.8　lm　W-1,　at　a　correlated　color　temperature　(CCT)　of　5769　K,　with　a　color　rendering　index　(CRI)　of　68.　In　addition,　the　LE　loss　of　the　specimen　doped　with　4　mol%　Al2O3　was　only　3.6%　after　heat　treatment　at　150　degrees　C　for　1200　h,　which　is　significantly　lower　than　that　of　traditional　resin　(19.3%).　Moreover,　a　possible　mechanism　for　reducing　the　LE　loss　using　glass-ceramics　was　proposed.