I am trying to use different lights to light up a room, not sure how should I make my room bright enough… can someone help, please?
Have you built your lighting? Interior lighting is all about small numbers of light sources, but lots of interior bounces. This scene looks like a single light source with no GI at all.
Read up on ‘lighmass’ in the docs if you aren’t sure, or take a look at the ‘how to make light mass epic (and understandable)’ thread in the archviz forum.
If you are trying to go fully dynamic, then there are various tricks to fake the effect - ambient lighting + DFAO, additional hidden point lights, LPV, etc. Won’t look as good as baked lighting, but if you are really careful you can cheat something similar.