You don’t always have to rely on the big, single lights on the ceiling. Sure, it illuminates the entire room well. But do you really need that amount of total illumination at all times? For example, you shouldn’t use the main lights at night when everyone else is asleep and you still want to read a book or use the PC.
Your best and energy efficient option is task lighting. These are small light fixtures that only illuminate a portion of the room. If you place them in the right areas, you can comfortably do a specific task without having to light up the whole room. Not only does it save you money but it’s great in visual terms as well.