Lu 3 Al 5 O 12 :Ce 3+ phosphor ceramics were fabricated by vacuum sintering. On this basis, a bi-layer composite phosphor was prepared by low-temperature sintering to cover the phosphor ceramics with a layer of SrAlSiN 3 :Eu 2+ -phosphor-in-glass (PiG). The optical, thermal, and colorimetric properties of LuAG:Ce 3+ phosphor ceramics, SrAlSiN 3 :Eu 2+ phosphors and SrAlSiN 3 :Eu 2+ -PiG were studied individually. Combining the bi-layer composite phosphors with the blue LED chip, it is found that the spectrum can be adjusted by varying the doping concentration of SrAlSiN 3 :Eu 2+ -PiG and the thickness of Lu 3 Al 5 O 12 :Ce 3+ phosphor ceramics. The maximal color rendering index value of the white LED is 86, and the R9 is 61. Under the excitation of a laser diode, the maximum phosphor conversion efficacy of the bi-layer composite phosphors is 120 lm/W, the R a is 83, and the correlated color temperature is 4534 K. These results show that the bi-layer composite phosphor ceramic is a candidate material to achieve high color rendering index for high brightness lighting.