There is no rule such that the bathroom lighting should be provided only in the ceiling or is better if it is provided at the sides or on top of the mirror. One has to fix the bathroom lightings according to one's taste and the mood that he or she wants to bring into the room. Even for a small bathroom, people, these days, go for two or more lighting fixtures. Thus, lighting is the most important factor to be considered in any modern bathrooms.
Task lighting for the bathrooms actually illuminates the area for specific activities like reading, using the toilet paper dispenser, or wash basin. You can have wall sconces at the sides of the mirror in your bathroom. Wall sconces offer extra task lighting; this is something that flush-mounted ceiling fixture cannot offer. Wall sconces use low-wattage bulbs, so there is no danger of the bulbs getting hot and cracking or breaking with water vapor contact.
In giving your bathroom lighting a contemporary design it is very important that you include three categories of lighting, which are ambient, task and accent lighting. Recessed lights, pendant lamps or even rope lights that are hidden can be used to reflect the ambient light instead of using the everyday central lighting fixture in the middle of the bathroom. This will help to give your bathroom some amount of warmth while bringing that sophisticated and modern look to the bathroom.
Natural light: In the event the style of your bathroom lets in a great deal of natural light, you should have only take into consideration illumination arrangements for after-dark hours. In other instances, you could have to use a mixture of natural and man-made light sources, or, even wholly man made sources to light up your bathroom. You can get a number of in halogen and standard incandescent lights available in the market. Choose the ones that are superb and bright and as close as possible to natural sunlight.