Bought to use for my son's. In the dark, the wire is decently visible. I would not say it's super bright, but acceptable. But during the day, hard to see. It's very flexible; was able to do 90 degree bends where needed, and works just fine after being cut to length. The Power adapter does emit a small, high pitched whinebut you can only hear it in relative quiet. For the price, the 5 pack was a good choice. Nice to have a solid, slow, and fast blink mode. It worked as expected..