White light emission is generated by combining the blue and red emissions of Eu2+ and Mn2+, respectively, and by adding the co-doping element Ba2+ in a single host lattice of Sr2B2P2O10. The effect of Eu2+ concentration on the emission intensity of Sr2B2P2O10:Eu2+ is studied, and the emission intensity reaches a maximum at 1% Eu2+. Energy migration over Eu2+ sites occurs, resulting in concentration quenching, and the concentration quenching mechanism is d-d interaction by Dexter theory. Eu2+ exhibits a high absorption in the near-UV region, and energy transfer from Eu2+ to Mn2+ occurs in Sr2B2P2O10:Eu2+,Mn2+. When Ba2+ is introduced in Sr2B2P2O10:Eu2+,Mn2+, a green emission band appears and white light is obtained. The results indicate that Sr2B2P2O10:Eu2+,Mn2+,Ba2+ is an efficient "single host lattice phosphor" for solid-state lighting technology using a UV light emitting diode to generate white light.