Nononono it’s totally fine! I’ve found that it’s actually really hard to learn about this stuff unless you’ve actually been to a live concert or viewing. Which… as some of you may know from experience, is excruciatingly difficult if you’re an overseas fan (꒪⌓꒪)
The short answer: UO stands for “Ultra Orange”, and is a chemical glowstick that glows bright orange, often only for a couple of minutes before it burns out. Because of how short-lived they are, people usually save them for their favorite songs at concerts.
The long answer: I’m gonna talk about glowsticks under the cut! Yayyy 😀 Skip to the Cyalume section for the full explanation on UOs 🙂
Relatable FE Quote or Something 