Most UV LED lights will work with any UV resin sold for fly tying, e.g. UV LED's sold for finding scorpions or pet urine stains. The ones for curing UV nail polish definitely work.
The quality varies enormously though. Both the power and reliability. Some cheap ones are pure crap, and some are just as good as the ones sold by fly tying suppliers. Based on reviews in fly tying forums and articles, I bought this one on Amazon - $15, works with Loon UV and comes with a rechargeable battery. Many fly tiers use $5 UV LED's with success.
Here's a great article and test by Fly Fish Food that compares UV resins and lights.
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