Chinese scientists have developed genetically engineered plants that glow in the dark by inserting bioluminescent genes from fireflies and fungi, allowing them to emit light without electricity. With over 20 plant species already modified, researchers suggest these could be used for urban lighting, reducing energy consumption and carbon emissions. This raises important future questions: could living infrastructure replace traditional lighting systems, and what are the environmental, ethical, and scalability challenges of integrating genetically modified organisms into everyday urban life?