LED flash still hasn’t really hit the mainstream yet. There are a couple of products out there, of course, like the Rotolite Neo, but for the most part, there’s still not very good for general use. They’re just not powerful enough. But sometimes they can be perfect for the intended use. In particular, high-speed events. This is because you can get an extremely fast flash duration.
You can buy these sorts of light, but they aren’t common and they aren’t cheap. So, tinkerer Tyler Gerritsen thought he’d have a go at making his own. And the results it produces are pretty outstanding.