The main goal of this final thesis was to project and design modular LED diffused-lightsource with ability of tuning intensity of light for each module separately. Objective isaccomplished by designing a master control unit with friendly user interface to control lightmodules. Master unit's user interface, in which is implemented Arduino uno board withATMEGA328P microcontroller as a brain, allows input of basic parameters about module(slave) address and light intensity percentage showing them on LCD screen. Chosen lightintensity is afterwards delivered to selected module's microcontroller ATMEGA168, throughI2C protocol which further corrects light intensity on LEDs. Such a lightning system isdesigned for industrial environments and processes which demand high quality light. Forinstance, a high definition camera which records process on production line with primary taskto recognize least anomalies. To avoid and minimize errors, lighting for the camera must be 30perfectly set and must not have a negative impact on the operation of the camera. Therefore,all the lighting modules are equipped with LEDs that are driven by PWM frequency of 40kHz, because at this frequency camera cant recognize flickering lighting that is otherwisevisible at lower frequencies. Tests performed, have shown that lightning modules fully meetthe conditions set in this task.