METHOD AND SYSTEM FOR CONTROLLING A LIGHT SOURCE

摘要

A light output (11) control system for implementing a method for sensing the tri-stimulus values (30a) for controlling a light output (11) illuminated from an LED based luminary (10) is disclosed. The system comprises one or more filter/photo diode sensors for sensing a first set of tri-stimulus values (30a) of the light output (11) and providing signals (CS1-CS3) indicative thereof. The signals are utilized in a transformation matrix (32) whereby a second set of tri-stimulus values (30a) is obtained. The system (60) controls the light output (11) as a function of the second set of tri-stimulus values (30a).