Impact of reflected sunlight from shading devices on cooling load in IES

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Hello all. 
can anyone help me with my question? I am simulating a window system with light shelf shading device. Light shelves have specular upper surface and reflect the light inside the building. The specularity and reflectivity can be defined in the radiance part.My questions are:
1) Does IES consider the solar heat gain (in the cooling load)  of reflected sunlight inside the building?
2) Does IES calculate the impact of reflected sunlight in both day light and cooling load inside the room?

Thanks

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