Flown ARC lights on my drone almost since day one. The lights are used for every flight, any time of the day or night, so I need brightness good enough for daylight. ARC met that. But these lights exceed it in multiple ways. Vifly has a true winner in my opinion.
So how is it better? First, cost. These are currently about a third the price of the comparable ARC product. But they outperform it with more LEDs, multiple color options, more brightness, and it uses USB C for charging! Yes!
The ARC still uses MicroUSB and is nearly the only thing left in my life still using that boat anchor plug. Vifly gets it. USB-C is a major convenience that would still win even if Vifly wasn't cheaper and better, which it also is.
I'm not sure how I did it, but my Vifly is currently flashing three white LEDs plus a red and green one all at the same time. This is exactly what I always wanted! Port and starboard indicators plus anti collision! This is the light I would make for myself if I had the skill. But Vifly already did it. And it's good.
Cons: some people don't seem to like the 3M mounting tape supplied with the light and I agree. It's not enough. But I already use another 3M Extreme version of the same thing with all my drone lights and never had one issue. It is outstandingly strong and it's possible to suspend the entire drone off just a tiny patch of that stuff. I've also accidentally stuck the drone to a fixed object with that fastener and it took every bit of power the drone had to lift off. It was a real battle.
Yet the lights pop on and off when needed with no effort. 3M Extreme is very highly recommended. If you are using anything else and the fasteners make you nervous, they should. Upgrade your choice and the problem is solved.