The importance of the room and its furniture
First, you need to be aware that the light required should be researched on the basis of the "worst" conditions, i.e. night-time.
When choosing lamps and spotlights, make your evaluation based on the absence of natural light: this will help you find out whether they are capable of lighting the room adequately.
The second thing to bear in mind is that surfaces can influence lighting: when a beam of light hits an object, the object either absorbs it or reflects it.
This is why smooth and glossy surfaces have a very high reflectance capacity in comparison with matt and rough surfaces.
Our advice is to think about the furniture in the room and make your decision accordingly.
You should also consider the layout of the room: which direction the windows face, the position of the rooms (south-facing rooms are lighter), if they are large or small and if any elements are present which could create shadowy areas.