Tool storage unit and lighting system

The present application relates to a tool storage unit including a drawer, the tool storage unit comprising: a light module disposed in the drawer and including: a printed circuit board including a power circuit having first and second input/output (I/O) power terminals and a first data circuit having first and second I/O data terminals; a microcontroller module disposed on the printed circuit board and operably coupled to the first data circuit; a sensor module disposed on the printed circuit board and operably coupled to the microcontroller module, wherein the microcontroller module is adapted to receive data from the sensor module; and an illumination circuit disposed on the printed circuit board and including a switching element and a light element, the light element is operably coupled to the power circuit and the switching element is operably coupled to the microcontroller module via the first data circuit and is adapted to receive a signal from the microcontroller module to illuminate the light element