thanks a lot for help. I see some of those but I want to understand how to use this formula in the comsol physics. I can't find any irradiation module to set lamp equations on it(comsol 5.3a). Also I want to know how could I considering lamp properties like power and wavelength range in physsics. My problem is a kind of software problem not in principles.
If you work with this software please let me know how to fix this.