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.
They allow light to be evenly reflected across your face removing any shadows that may deceive you or make it hard for you to groom yourself properly in a timely fashion. Recessed lights are best for the shower stalls and areas over bathtubs and toilets.
Accent lights are used to bring focus to various details in the bathroom, such as art piece, sculptures or architectural design in the bathroom tiles. These small recessed lights are able to attract attention to these details without taking up excess space on the counter. On the other hand they will help to make your bathroom look more interesting and sophisticated.
There are smaller sizes of bathroom lighting fixtures that are easily available these days, which not only requires less space but also opens up a wide array of possibilities of bathroom lighting. It is always better to use a mix of ceiling mount as well as wall sconces type of fixtures to light up a larger bathroom. Most bathrooms there days are more spacious as well as luxurious. To light up these types of bathrooms is a task that one has to carefully undertake to produce the desired results.