Do you have recessed lights now? What is the improvement you want to make?
Yes. Just something to spruce them up, a little change...other than replacing them.
What does this mean. Spruce them up? Not quite and answer.....
There are countless styles of recessed lighting.
Without first seeing what type you have , it is hard to give suggestions on what realistically may be done to improve their appearance. Please post a picture of your lights so that we can see what you have to work with.