I’m running a Varia and a Flare on the rear and a white Flare in the front. All tie into my computer via ANT. The computer automatically changes the headlight to a bright steady beam at sunset which is handy when I’m out later than planned. And it can sense deceleration and bake the rear lights go full bright like a quasi-brake light. All
combined with the situational awareness the Varia gives and I’m quite happy.