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@maryam, the answer to your question is no, OpenStudio cannot use Radiance to simulate electric lighting. Sorry! It is a bit confusing since there is that luminaire object there, but as David intimated these luminaires are not exported to Radiance. They also do not currently support photometry -- only position and load.

@maryam, the answer to your question is no, OpenStudio cannot use Radiance to (spatially) simulate electric lighting. Sorry! It is a bit confusing since there is that luminaire object there, but as David intimated these luminaires are not exported to Radiance. They also do not currently support photometry -- only position and load.

@maryam, the answer to your question is no, OpenStudio cannot currently use Radiance to (spatially) simulate electric lighting. Sorry! It is a bit confusing since there is that luminaire object there, but as David intimated these luminaires are not exported to Radiance. They also do not currently support photometry -- only position and load.

To be clear, the Radiance routines in OpenStudio do modify the electric lighting load schedules, but they work simplistically off of the "Daylighting Control Point" illuminance, linearly interpolating the lighting power fraction based on the (Radiance-calculated) daylight illuminance versus the control point's setpoint. What OpenStudio-Radiance does not do is perform a spatial simulation of the electric lighting using photometric data (e.g. "IES Files").