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.
Always go for the energy-efficient option , Interior light does not have to be very expensive, especially not with the existence of energy-efficient lighting fixtures. They make great bathroom light ideas. When buying, always check out the bulb. What sort of bulb is it. Compact Fluorescent Lights or CFL and LED lights are considered two of the most energy-efficient fixtures available today.
Spot lighting such as that offered from recessed ceiling lights, usually LED or halogen, can look incredibly stylish, and helps focus more light where you need it. But for lighting near bathroom mirrors a soft, diffused effect can work extremely well, giving you a more even light.
By using light fixtures with dimmer control, you will alter the intensity of the light to get exactly the required relaxing feel. Dimmers are also energy-savers and your lights will last longer. Just keep in mind that you would need incandescent dimmers for incandescent and halogen lights and agreeable dimmers for any other kinds of lights.