After we built a pergola over our concrete patio, I was excited to decorate with fun patio lights. Call me cheap, but I was a little surprised by the price. Since I already had strings of lights in my Christmas decoration box {I'm sure you do, too} that are approved for outdoor use, I set about finding a way to use them instead. To start, I bought a bag of 144 ping pong balls from Amazon for $7. I cut an "X" in each ball with an X-ACTO knife and pushed the bulb through the hole.…
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