<p>Quantum light sources with configurable photon lifetimes are essential for large-scale quantum circuits, enabling applications in programmable quantum computing, quantum communications, and quantum metrology. However, the fundamental trade-off between efficiency and photon lifetime imposes significant challenges on the design of high-performance, large configurable lifetime quantum light sources. Here, we report on such chip-scale quantum light sources by harnessing the unique feature of parity-time (PT) symmetry. The core design centers on employing PT-symmetric coupling between two microresonators of distinct circumferences, enabling a broad range and selective tuning of the intracavity photon density of states. By controlling the alignment between resonators, we achieved a near 20-fold photon lifetime tuning range (7.1 ± 1.5 ~ 129.6 ± 1.9 ps), with the shortest lifetimes near the exceptional point (EP). The device generates energy-time entangled photon pairs with 87.1 ± 1.1% interference visibility and a heralded second-order autocorrelation of <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\({g}_{H}^{\left(2\right)}\left(0\right)=\)</EquationSource> <EquationSource Format="MATHML"><math> <msubsup> <mrow> <mi>g</mi> </mrow> <mrow> <mi>H</mi> </mrow> <mrow> <mfenced close=")" open="("> <mrow> <mn>2</mn> </mrow> </mfenced> </mrow> </msubsup> <mfenced close=")" open="("> <mrow> <mn>0</mn> </mrow> </mfenced> <mo>=</mo> </math></EquationSource> </InlineEquation> 0.069 ± 0.001. Our work highlights the potential of PT symmetry for advanced quantum applications, including high-speed communication and programmable quantum computing, quantum coherent tomography, and beyond.</p>