The most common use of up lighting is in a recessed cove around the top perimeter of a room. To maximize light output use a T5 fluorescent or LED light source that will wash the ceiling with light. This helps to create a brighter ceiling that bounces and reflects light throughout the space without glare. Combine this with lots of natural daylight to increase the overall light levels in a room.
A floor lamp nestled against a window is a smart substitute for daylight so that when the sun goes down an ambient glow will pour in from a similar direction to balance the central light overhead.
It may seem impossible to add a pretty pendant light in many cases especially when working with a concrete condo ceiling. A dropped ceiling panel can provide a place to house lighting fixtures like pot lights or pendants or even a minimalist LED strip to brighten a passageway while creating a beautiful space-defining feature.