This article reports an attemp to creation of the Mn4+- doped Sr4Al6O12SO4 (SAOS) to achieve a deep red luminescence phosphor. The creation of SAOS at 1200⁰C resulted strong luminescence in the range of 645-674nm; the Commission International de I'Eclairage (CIE) chromaticity coordinates at (0.732, 0.287). The excitation bands at ˜320, 400 and 470 nm are well matched with commercialbLED chips as excitation source which was potential application in warm white light - emitting diodes