The Phototherapy Unit ecosystem comprises a structured chain that transforms raw inputs into light therapy solutions. Upstream, component suppliers provide LEDs, optics, electronic sub‑assemblies, and medical‑grade plastics that meet health‑care specifications. In the midstream, OEM manufacturers assemble these parts into certified devices, while technology providers embed dosage‑control software and sensor interfaces that define therapeutic performance. System integrators then adapt the units to hospital infrastructure, ensuring compatibility with monitoring and power systems. Downstream, distributors manage inventory and logistics, service providers deliver installation, calibration, and maintenance, and end‑user institutions such as hospitals, NICUs, and dermatology clinics operate the units for patient care. Value is captured at each stage through product differentiation and regulatory compliance.