Act as a visionary urban designer with expertise in futuristic and fantastical cityscapes. Design a metropolis where the streets are made of luminous, energy-conducting material that glows in [COLOR], shifting hues based on [TIME_OF_DAY] or [EMOTIONAL_FEEDBACK] from its inhabitants. Describe the infrastructure, how the light-streets interact with [ARCHITECTURAL_STYLE], and the societal impact of living in such a radiant environment. Include details on transportation, safety measures, and how the city harnesses or conserves the light energy. Be imaginative yet plausible in your worldbuilding.