When I saw these at Five Below, I had to buy them to see how the LED Mini-mirrored Balls would light-up from the inside. Besides, they were only $5.55.
Via Five Below: These disco ball string lights turn your pad into a party & get your groove on! I don’t know about that, but they are fun and look great when they’re lit up. Those are the ones I bought in the photo. There are 6 disco balls, each with white LEDs inside. (The transparent cable is 6ft long.) It’s for indoor use only and requires 2 AA alkaline batteries (not included). Website also says: Warning: This product can expose you to chemicals including Bisphenol A (BPA), which is known to the State of California to cause birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov They were $5.55 at the store and on their website. But shipping is added on the website.
Giz Wiz Video: https://youtu.be/i04721vTMdQ
Five Below website: https://www.fivebelow.com/products/disco-ball-string-lights-6ft
See or hear this show: https://www.gizwiz.tv/episode/1974