| abstract |
Disclosed is a lighting unit ( 10 ) that utilizes sensor data to select a fade-in or fade-out profile for one or more light sources ( 12 ). The lighting unit includes a clock module ( 20 ), an ambient light level sensor ( 18 ), and a controller ( 16 ). The controller receives ambient light level data from the ambient light level sensor and time of day data from the clock module, and utilizes the received information to automatically select a fade-in or fade-out profile. The controller can also use the received ambient light level data to calibrate the clock module. |