Light big room

I have a very big open office room and I am trying to light it.
I am trying to put about 50-60 spot lights on the room with big angle.
When I am getting to 15 lights the game starts to be little laggy so if I will reach to 60 the game will stuck.
I understands that placing alot of lights on the same room is not the right way to light this big room.
I have tried to put less lights with big intensify but the reasolt is not very good. Too shiny places and too dark places.
How can I light this big room?

Well, you can bake the lighting, or have a bunch of lights that don’t overlaor disable shadows on a lot of the lights, it really depends on the scene and your goals.