Can you put a lighter shade composite on top of a darker composite?

I have a composite on my tooth, because it it darker than the rest of my teeth and the shape is smaller as well I have been weighing the option of getting a veneer. I was wondering could I just get a lighter color composite (this will solve the darkened color and I wouldnt worry about the size) just thinking about my teeth being shaved down and the pain and horror stories about the temp veneer you have until your real one arrives scares me.