A standard single pendant light fitting near the centre of the ceiling can sometimes leave a lot to be desired. As long as you can get to the ceiling void from above without too much disruption, it's not complicated to move a light to wherever you really need it. Alternatively, you can boost your light levels by adding extra pendants which you operate either by the existing switch or by a new one. You'll find that pre-wired lampholder-plus-flex combinations are widely available.