Easy added shelf space.

I didn't have any more space shelf available,  for my new bowling pin lamp. And I needed a tall space.

So , I extended my existing shelves by adding wooden sheets , stained a contrasting color. these are staking shelves, so I removed the top stack, added stained wood sheets , put top stack back in place. this gave me the needed tall space x 4. The weight of the shelves hold it in place. Now I have 4 tall spaces from 1 simple trick. What do you think ?