Daylight analysis with Galapagos+Honeybee+Ladybug

Hello everybody,

I'm a engineering student and I'm working on my final thesis. I'm trying to optimize a building model using galapagos and I've never used this tool before. I watched a lot of tutorials but none explain me how to modify lighting power/control type/shading position in order to get as close as possible to the values of illuminance that I measured with a luxmeter or how to increase the daylight factor modifying the reflectance values of the opaque components. All the examples I found act on the geometry of the building, but since I'm working on an already existing building, I cannot modify it. 

Is there anyone that can help me?

Thank you in advance

Chiara