I'll say this about integrated light solutions from experience - more wires to run/deal with when trouble shooting, added load on the battery, potential for bad things to happen if there's any electrical feedback issue. I think as long as the connection is fused and there's a diode in there then not as big of a danger - and I know these nicer lights are much safer on that end. It's hard to tell how exactly the light module works but my guess is it's taking the light output signal to turn on a relay, you hook up the XT30 connector to a power source, and then the other XT30 gives you 12V for a light to tap into. My take aways from this...
Still uses an external power source unless your battery has an extra XT30 output on it, basically allows you to use the switch on your ebike display to turn on the light. I prefer separate power sources for the sake of redundancy (your battery dies prematurely on a night ride and now you are without power
and in the dark) but then tying the operation of that switch via the display/controller kind of moots that benefit. If the light module could run a headlight with high beam signal, and a tail light with a brake signal - then it would be worth the expense & the trouble of running wires and getting it set up properly and work incredibly well with the fancy Supernova lights.
This is what I currently use - no wires, no grief, can come off of the bike very easily and is under $20 Blitzu 168T - mine is like 6 years old and those bare red emitters are really intense
front I currently have a Lumintop B01 for greenway/street riding where I know there will be oncoming traffic - under $40 with the included 2600mAh 18650
new models have USB C charging (upgraded from micro) and it's got a decent run time with a 21700 in it - 5 hours at this output (high) - note this photo makes it like slightly warmer than it really is, but it's around the 4000K CCT area. This site has several lights to compare - not a huge amount but the setup is done
very well
https://bikelightcheckers.com/en/
My battery box plans, frame/fork bumper, and speed sensor mount are all sent off for printing so now I can shift focus to the next step - printing a 'universal' light bracket & 4x21700 XT30 case so I can use more serious flashlight heads for when I'm out riding single track and don't want to be lion food. The universal system will be a 'yoke' that fits light-specific adapters. I'll only be using the head of the flashlight so the adapter will consist of a piece that screws into the head and has contacts & the wire with XT30 to hook up to the battery box, and the external connection points of the adapter will fit the yoke. The way the yoke will fit into the bike allows for yaw adjustment where the adapter's connection point to the yok will allow for pitch adjustment. The right light in the picture is about as bright as a pair of vehicle high beams with about the same reach, the left one has options for floodier optics (individual TIR lenses on each emitter so mix & match, the manufacturer also has a wide selection of emitters and will mix and match for a balance of throw & flood at request) - not my picture but here's a drone shot of the light from another user/reviewer
sorry to hijack the thread - my rant is over. I'm just excited for the next step,
really eager for my X1 to arrive already!