It's not so much about the lights as the control. Pretty much any LED fixture (or conventional) can do a flame chase if the controller can do it. Magicgadgets can do it with conventional dimmers (or dimmable LED) . Any moving light DMX system can do a flicker chase, but the REAL cool effects are when you can use any RGB or greater fixtures as "pixels" and feed actual video of fire into the "screen" you've pixel-mapped. I've done this using 8x cheap DJ wash lights and a simple (free) media server - playing video of actual fire. It's a very realistic effect. Most moving light board mfg offer some simple media server, I use Chamsys, and the learning curve isn't easy but it's worth it for the control you can get even on Skypanels to be able to fine-tune the parameters of the fx.