That's a good one, too. I've never looked at those tables really so thanks for pointing it out.
If you really want to be "by the book" then that only works while the item is in moonlight. Though, if you include Xanathar's... the characters can search out the recipe for a dimly-glowing item, and craft it. Surely, if that's it's only power, it is a common item in terms of expenses and time....