You may not think lighting is the most important aspect of your bathroom renovations. However, the lighting creates the lens through which you see and experience the bathroom. It affects how all the different surfaces appear and the overall mood. Consider the following reasons why you should concentrate on lighting during bathroom renovations. Create Practical Grooming Light If you install one basic light on the ceiling, then when you stand in front of the mirror to brush your hair, clean your teeth, or shave, your face will likely be cast in shadow.