
First, you need to know how to size bathroom lighting fixtures. Basically, you will need to find lighting fixtures that are most suitable for the overall size of your bathroom and that coordinate well with the size of other items in the room.
It is important that you measure properly. An oversight of even an inch can leave you with a lot of trouble that cannot be easily solved. For the bathroom vanity, measure the space for width, length, and height. You will also need to know the measurements of your vanity first before deciding on the lighting fixtures you will incorporate with your vanity.