Interior lighting of any room in the house speaks to exactly what purpose the room is used for, an example would be that the interior lighting of a bathroom would generally be different to that of a lounge. For several reasons, since there is a lot of water usage in a bathroom the light will not be placed directly above a shower because when you are have a warm shower the steam will rise up directly to where the lighting is mounted. In the case of a lounge you will probably have lights directly above the coffee and all around the lounge because of the size of the lounge and where there television screen is going to be mounted or place it in order to prevent a glare on the TV screen. In the case or a dress room for a stage play the interior lighting will be specifically around the mirror so that when the makeup artist is making up the actor or actress they have light coming from all angles in order for them to perfect their work for the audience.
When it comes to some households chandeliers are very popular this is often in case of a house that has a high ceiling. Where somebody has built a home from scratch and actually designed it themselves it would be wise to consult an electrician before consulting an interior designer, for the obvious reason that interior designers do not have a clue about household or building electrical wiring. So the electrician would actually place the lights where you want them in each room and the interior designer will have a catalogue or presentation for you look at and place orders for the designs which suit your interior lighting design that you want for your household, office, shop or even showroom.
Designs are also available online from what is known as online catalogues, where you will also be exposed to track lighting basics which is easier to install even when one is remodeling their home. So it will be good to research widely on the internet for the best prices as all these wonderful materials come at a price.