Does that space have any windows at all? I can’t be sure if those blue sections are openings or emissive meshes. If there are no openings dir. light is going to be useless. If those blue sections are meshes with emissive material select them and enable Use Emissive for Static Lighting for additional light. You can also use just rectangular lights but you may also need to use a lighter color for the floor(while building the lights. you can switch back to its normal material afterwards) to get more bounces from lights.