Instead of or in addition to sconces hidden lights can add a general glow that bounces off the wall and into the room in an even subtler and more diffuse way. Cove lights are built into niches that hide the light source (often a plain LED strip) but hidden lights can also be obscured by medicine cabinets shelving or storage units.
In a renovation on the other hand we have to consider what effect a new skylight will have on the efficiency of the existing building. In some cases the additional sunlight (and therefore heat) can help reduce the amount of energy needed to heat the house. It depends greatly on the local climate but also on the design of the building envelope of the house.
It’s important to understand that even on a sunny summer day natural light from a single window is not always sufficient to thoroughly light a room and of course this is especially true come nighttime. Additional light sources near your window will allow you to subtly fill out the light scheme and achieve a balance so the space feels beautiful at any time.