For the irradiator we use state-of-the-art technology of light source – high brightness LEDs. Long-life performance of the LEDs provides working capacity of the lamp without power loss 40 thousands hours. Medical-technical performances of OFN-02 are significantly better than corresponding performances of lamp irradiators. Use of new radiation source makes phototherapy more effective, eliminates harmful side effects, which inheres to lamp light source. Therapeutic efficacy improves due to increase of spectral density of radiated power two times more in comparison with lamp irradiator. The principle of operation of the device is based on irradiation of child skin using light in spectral range 450-500 nm (blue radiation), which results in reduction of bilirubin concentration in blood. The irradiator is intended for use in intensive care wards, newborns pathology departments, urgent and treatment pediatry departments and maternity hospitals.